Sparkline in unicode

From Rosetta Code
Task
Sparkline in unicode
You are encouraged to solve this task according to the task description, using any language you may know.

A sparkline is a graph of successive values laid out horizontally where the height of the line is proportional to the values in succession.


Task

Use the following series of Unicode characters to create a program that takes a series of numbers separated by one or more whitespace or comma characters and generates a sparkline-type bar graph of the values on a single line of output.

The eight characters: '▁▂▃▄▅▆▇█'
(Unicode values U+2581 through U+2588).

Use your program to show sparklines for the following input, here on this page:

  1. 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
  2. 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
(note the mix of separators in this second case)!
Notes
  • A space is not part of the generated sparkline.
  • The sparkline may be accompanied by simple statistics of the data such as its range.
  • A suggestion emerging in later discussion (see Discussion page) is that the bounds between bins should ideally be set to yield the following results for two particular edge cases:
"0, 1, 19, 20" -> ▁▁██
(Aiming to use just two spark levels)
"0, 999, 4000, 4999, 7000, 7999" -> ▁▁▅▅██
(Aiming to use just three spark levels)
It may be helpful to include these cases in output tests.
  • You may find that the unicode sparklines on this page are rendered less noisily by Google Chrome than by Firefox or Safari.



APL[edit]

Note → this is in a 0-indexed version of APL

Solution:
   sparkln←{'▁▂▃▄▅▆▇█'[⌊0.5+7×⍵÷⌈/⍵]}
Example:
      sparkln 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
▂▃▄▅▅▆▇█▇▆▅▅▄▃▂
sparkln 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
▂▁▄▃▆▅█▇
 

Note → APL accepts the input with commas and spaces naturally. If one wanted to read input as a string they could use ⍎⍞ to do so.


AppleScript[edit]

use AppleScript version "2.4"
use framework "Foundation"
use scripting additions
 
on run
unlines(map(¬
compose(compose(unlines, sparkLine), readFloats), ¬
{"0, 1, 19, 20", "0, 999, 4000, 4999, 7000, 7999", ¬
"0, 1000, 4000, 5000, 7000, 8000", ¬
"1 2 3 4 5 6 7 8 7 6 5 4 3 2 1", ¬
"1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"}))
end run
 
 
-- sparkLine :: [Float] -> [String]
on sparkLine(xs)
set ys to sort(xs)
set mn to item 1 of ys
set mx to item -1 of ys
set n to length of xs
set mid to (n div 2)
set w to (mx - mn) / 8
 
script bound
on |λ|(x)
mn + (w * x)
end |λ|
end script
set lbounds to map(bound, enumFromTo(1, 7))
 
script spark
on |λ|(x)
script flipGT
on |λ|(b)
b > x
end |λ|
end script
script indexedBlock
on |λ|(i)
item i of "▁▂▃▄▅▆▇"
end |λ|
end script
maybe("█", indexedBlock, findIndex(flipGT, lbounds))
end |λ|
end script
 
script str
on |λ|(x)
x as string
end |λ|
end script
 
{concat(map(spark, xs)), ¬
unwords(map(str, xs)), ¬
"Min " & mn as string, ¬
"Mean " & roundTo(mean(xs), 2) as string, ¬
"Median " & bool(item mid of xs, ((item mid of xs) + ¬
(item (mid + 1) of xs)) / 2, even(n)), ¬
"Max " & mx as string, ""}
end sparkLine
 
 
-- GENERIC -------------------------------------------------
 
-- Just :: a -> Maybe a
on Just(x)
{type:"Maybe", Nothing:false, Just:x}
end Just
 
-- Nothing :: Maybe a
on Nothing()
{type:"Maybe", Nothing:true}
end Nothing
 
-- bool :: a -> a -> Bool -> a
on bool(f, t, p)
if p then
t
else
f
end if
end bool
 
-- compose (<<<) :: (b -> c) -> (a -> b) -> a -> c
on compose(f, g)
script
property mf : mReturn(f)
property mg : mReturn(g)
on |λ|(x)
mf's |λ|(mg's |λ|(x))
end |λ|
end script
end compose
 
-- concat :: [[a]] -> [a]
-- concat :: [String] -> String
on concat(xs)
set lng to length of xs
if 0 < lng and string is class of (item 1 of xs) then
set acc to ""
else
set acc to {}
end if
repeat with i from 1 to lng
set acc to acc & item i of xs
end repeat
acc
end concat
 
-- enumFromTo :: Int -> Int -> [Int]
on enumFromTo(m, n)
if m ≤ n then
set lst to {}
repeat with i from m to n
set end of lst to i
end repeat
return lst
else
return {}
end if
end enumFromTo
 
-- even :: Int -> Bool
on even(x)
0 = x mod 2
end even
 
-- Takes a predicate function and a list and
-- returns Just( the 1-based index of the first
-- element ) in the list satisfying the predicate
-- or Nothing if there is no such element.
-- findIndex(isSpace, "hello world")
--> {type:"Maybe", Nothing:false, Just:6}
 
-- findIndex(even, [3, 5, 7, 8, 9])
--> {type:"Maybe", Nothing:false, Just:4}
 
-- findIndex(isUpper, "all lower case")
--> {type:"Maybe", Nothing:true}
-- findIndex :: (a -> Bool) -> [a] -> Maybe Int
on findIndex(p, xs)
tell mReturn(p)
set lng to length of xs
repeat with i from 1 to lng
if |λ|(item i of xs) then return Just(i)
end repeat
return Nothing()
end tell
end findIndex
 
-- foldl :: (a -> b -> a) -> a -> [b] -> a
on foldl(f, startValue, xs)
tell mReturn(f)
set v to startValue
set lng to length of xs
repeat with i from 1 to lng
set v to |λ|(v, item i of xs, i, xs)
end repeat
return v
end tell
end foldl
 
-- map :: (a -> b) -> [a] -> [b]
on map(f, xs)
tell mReturn(f)
set lng to length of xs
set lst to {}
repeat with i from 1 to lng
set end of lst to |λ|(item i of xs, i, xs)
end repeat
return lst
end tell
end map
 
-- mean :: [Num] -> Num
on mean(xs)
script
on |λ|(a, x)
a + x
end |λ|
end script
foldl(result, 0, xs) / (length of xs)
end mean
 
-- | The 'maybe' function takes a default value, a function, and a 'Maybe'
-- value. If the 'Maybe' value is 'Nothing', the function returns the
-- default value. Otherwise, it applies the function to the value inside
-- the 'Just' and returns the result.
-- maybe :: b -> (a -> b) -> Maybe a -> b
on maybe(v, f, mb)
if Nothing of mb then
v
else
tell mReturn(f) to |λ|(Just of mb)
end if
end maybe
 
-- Lift 2nd class handler function into 1s class script wrapper
-- mReturn :: First-class m => (a -> b) -> m (a -> b)
on mReturn(f)
if script is class of f then
f
else
script
property |λ| : f
end script
end if
end mReturn
 
-- readFloats :: String -> [Float]
on readFloats(s)
script asReal
on |λ|(n)
n as real
end |λ|
end script
map(asReal, splitRegex("[\\s,]+", s))
end readFloats
 
-- regexMatches :: String -> String -> [[String]]
on regexMatches(strRegex, strHay)
set ca to current application
-- NSNotFound handling and and High Sierra workaround due to @sl1974
set NSNotFound to a reference to 9.22337203685477E+18 + 5807
set oRgx to ca's NSRegularExpression's regularExpressionWithPattern:strRegex ¬
options:((ca's NSRegularExpressionAnchorsMatchLines as integer)) ¬
|error|:(missing value)
set oString to ca's NSString's stringWithString:strHay
 
script matchString
on |λ|(m)
script rangeMatched
on |λ|(i)
tell (m's rangeAtIndex:i)
set intFrom to its location
if NSNotFound ≠ intFrom then
text (intFrom + 1) thru (intFrom + (its |length|)) of strHay
else
missing value
end if
end tell
end |λ|
end script
end |λ|
end script
 
script asRange
on |λ|(x)
range() of x
end |λ|
end script
map(asRange, (oRgx's matchesInString:oString ¬
options:0 range:{location:0, |length|:oString's |length|()}) as list)
end regexMatches
 
 
-- roundTo :: Float -> Int -> Float
on roundTo(x, n)
set d to 10 ^ n
(round (x * d)) / d
end roundTo
 
-- sort :: Ord a => [a] -> [a]
on sort(xs)
((current application's NSArray's arrayWithArray:xs)'s ¬
sortedArrayUsingSelector:"compare:") as list
end sort
 
-- splitRegex :: Regex -> String -> [String]
on splitRegex(strRegex, str)
set lstMatches to regexMatches(strRegex, str)
if length of lstMatches > 0 then
script preceding
on |λ|(a, x)
set iFrom to start of a
set iLocn to (location of x)
 
if iLocn > iFrom then
set strPart to text (iFrom + 1) thru iLocn of str
else
set strPart to ""
end if
{parts:parts of a & strPart, start:iLocn + (length of x) - 1}
end |λ|
end script
 
set recLast to foldl(preceding, {parts:[], start:0}, lstMatches)
 
set iFinal to start of recLast
if iFinal < length of str then
parts of recLast & text (iFinal + 1) thru -1 of str
else
parts of recLast & ""
end if
else
{str}
end if
end splitRegex
 
-- unlines :: [String] -> String
on unlines(xs)
set {dlm, my text item delimiters} to ¬
{my text item delimiters, linefeed}
set str to xs as text
set my text item delimiters to dlm
str
end unlines
 
-- unwords :: [String] -> String
on unwords(xs)
set {dlm, my text item delimiters} to ¬
{my text item delimiters, space}
set s to xs as text
set my text item delimiters to dlm
return s
end unwords
Output:
▁▁██
0.0 1.0 19.0 20.0
Min 0.0
Mean 10.0
Median 10.0
Max 20.0

▁▁▅▅██
0.0 999.0 4000.0 4999.0 7000.0 7999.0
Min 0.0
Mean 4166.17
Median 4499.5
Max 7999.0

▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0
Min 1.0
Mean 4.27
Median 7.0
Max 8.0

▂▁▄▃▆▅█▇
1.5 0.5 3.5 2.5 5.5 4.5 7.5 6.5
Min 0.5
Mean 4.0
Median 4.0
Max 7.5

AutoHotkey[edit]

Works with: AutoHotkey_L
SetFormat, FloatFast, 0.1
strings := ["1 2 3 4 5 6 7 8 7 6 5 4 3 2 1"
, "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"]
 
Loop, % strings.MaxIndex()
{
SL := Sparklines(strings[A_Index])
MsgBox, % "Min: " SL["Min"] ", Max: " SL["Max"] ", Range: " SL["Rng"] "`n" SL["Chars"]
}
 
Sparklines(s)
{
s := RegexReplace(s, "[^\d\.]+", ",")
Loop, Parse, s, `,
{
Max := A_LoopField > Max ? A_LoopField : Max
Min := !Min ? Max : A_LoopField < Min ? A_LoopField : Min
}
Rng := Max - Min
Loop, Parse, s, `,
Chars .= Chr(0x2581 + Round(7 * (A_LoopField - Min) / Rng))
return, {"Min": Min, "Max": Max, "Rng": Rng, "Chars": Chars}
}
Output:
Min: 1, Max: 8, Range: 7
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

Min: 0.5, Max: 7.5, Range: 7.0
▂▁▄▃▆▅█▇

C[edit]

This seemingly simple task turns out to be very complicated for languages like C. As the characters to be printed are Unicode, there is no platform independent way to do so. The implementation below works on Linux but not on Windows, detailed investigations show that there is no way, at least no reliable and/or easily reproducible way, to accomplish this task via C on Windows. This is not due to any lacunae in C but due to the vagaries of the Windows Command shell.

Linux version[edit]

Accepts data via command line, prints out usage on incorrect invocation.

 
#include<string.h>
#include<stdlib.h>
#include<locale.h>
#include<stdio.h>
#include<wchar.h>
#include<math.h>
 
int main(int argC,char* argV[])
{
double* arr,min,max;
char* str;
int i,len;
if(argC == 1)
printf("Usage : %s <data points separated by spaces or commas>",argV[0]);
else{
arr = (double*)malloc((argC-1)*sizeof(double));
for(i=1;i<argC;i++){
len = strlen(argV[i]);
 
if(argV[i][len-1]==','){
str = (char*)malloc(len*sizeof(char));
strncpy(str,argV[i],len-1);
arr[i-1] = atof(str);
free(str);
}
else
arr[i-1] = atof(argV[i]);
if(i==1){
min = arr[i-1];
max = arr[i-1];
}
else{
min=(min<arr[i-1]?min:arr[i-1]);
max=(max>arr[i-1]?max:arr[i-1]);
}
}
 
printf("\n%Max : %lf,Min : %lf,Range : %lf\n",max,min,max-min);
 
setlocale(LC_ALL, "");
 
for(i=1;i<argC;i++){
printf("%lc", (wint_t)(9601 + (int)ceil((arr[i-1]-min)/(max-min)*7)));
}
}
return 0;
}
 

Invocation and output :

/home/aamrun/rosettaCode>./sparkLine 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
Max : 8.000000,Min : 1.000000,Range : 7.000000
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
/home/aamrun/rosettaCode>./sparkLine 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
Max : 7.500000,Min : 0.500000,Range : 7.000000
▂▁▄▃▆▅█▇

C++[edit]

 
#include <iostream>
#include <sstream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <locale>
 
class Sparkline {
public:
Sparkline(std::wstring &cs) : charset( cs ){
}
virtual ~Sparkline(){
}
 
void print(std::string spark){
const char *delim = ", ";
std::vector<float> data;
// Get first non-delimiter
std::string::size_type last = spark.find_first_not_of(delim, 0);
// Get end of token
std::string::size_type pos = spark.find_first_of(delim, last);
 
while( pos != std::string::npos || last != std::string::npos ){
std::string tok = spark.substr(last, pos-last);
// Convert to float:
std::stringstream ss(tok);
float entry;
ss >> entry;
 
data.push_back( entry );
 
last = spark.find_first_not_of(delim, pos);
pos = spark.find_first_of(delim, last);
}
 
// Get range of dataset
float min = *std::min_element( data.begin(), data.end() );
float max = *std::max_element( data.begin(), data.end() );
 
float skip = (charset.length()-1) / (max - min);
 
std::wcout<<L"Min: "<<min<<L"; Max: "<<max<<L"; Range: "<<(max-min)<<std::endl;
 
std::vector<float>::const_iterator it;
for(it = data.begin(); it != data.end(); it++){
float v = ( (*it) - min ) * skip;
std::wcout<<charset[ (int)floor( v ) ];
}
std::wcout<<std::endl;
 
}
private:
std::wstring &charset;
};
 
int main( int argc, char **argv ){
std::wstring charset = L"\u2581\u2582\u2583\u2584\u2585\u2586\u2587\u2588";
 
// Mainly just set up utf-8, so wcout won't narrow our characters.
std::locale::global(std::locale("en_US.utf8"));
 
Sparkline sl(charset);
 
sl.print("1 2 3 4 5 6 7 8 7 6 5 4 3 2 1");
sl.print("1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5");
 
return 0;
}
Output:
Min: 1; Max: 8; Range: 7
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Min: 0.5; Max: 7.5; Range: 7
▂▁▄▃▆▅█▇

Clojure[edit]

(defn sparkline [nums]
(let [sparks "▁▂▃▄▅▆▇█"
high (apply max nums)
low (apply min nums)
spread (- high low)
quantize #(Math/round (* 7.0 (/ (- % low) spread)))]
(apply str (map #(nth sparks (quantize %)) nums))))
 
(defn spark [line]
(if line
(let [nums (read-string (str "[" line "]"))]
(println (sparkline nums))
(recur (read-line)))))
 
(spark (read-line))
Output:
$ clj sparkline.clj <<<$'1 2 3 4 5 6 7 8 7 6 5 4 3 2 1\n1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5'
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
▂▁▄▃▆▅█▇

Common Lisp[edit]

(defun buckets (numbers)
(loop with min = (apply #'min numbers)
with max = (apply #'max numbers)
with width = (/ (- max min) 7)
for base from (- min (/ width 2)) by width
repeat 8
collect (cons base (+ base width))))
 
(defun bucket-for-number (number buckets)
(loop for i from 0
for (min . max) in buckets
when (and (<= min number) (< number max))
return i))
 
(defun sparkline (numbers)
(loop with buckets = (buckets numbers)
with sparks = "▁▂▃▄▅▆▇█"
with sparkline = (make-array (length numbers) :element-type 'character)
with min = (apply #'min numbers)
with max = (apply #'max numbers)
for number in numbers
for i from 0
for bucket = (bucket-for-number number buckets)
do (setf (aref sparkline i) (char sparks bucket))
finally (format t "Min: ~A, Max: ~A, Range: ~A~%" min max (- max min))
(write-line sparkline)))
 
(defun string->numbers (string)
(flet ((delimiterp (c)
(or (char= c #\Space) (char= c #\,))))
(loop for prev-end = 0 then end
while prev-end
for start = (position-if-not #'delimiterp string :start prev-end)
for end = (position-if #'delimiterp string :start start)
for number = (read-from-string string t nil :start start :end end)
do (assert (numberp number))
collect number)))
 
(defun string->sparkline (string)
(sparkline (string->numbers string)))
 
(string->sparkline "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1")
(string->sparkline "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5")
Output:
Min: 1, Max: 8, Range: 7
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Min: 0.5, Max: 7.5, Range: 7.0
▂▁▄▃▆▅█▇

D[edit]

Translation of: Python
void main() {
import std.stdio, std.range, std.algorithm, std.conv,
std.string, std.regex;
 
"Numbers please separated by space/commas: ".write;
immutable numbers = readln
.strip
.splitter(r"[\s,]+".regex)
.array /**/
.to!(real[]);
immutable mm = numbers.reduce!(min, max);
writefln("min: %4f, max: %4f", mm[]);
immutable bars = iota(9601, 9609).map!(i => i.to!dchar).dtext;
immutable div = (mm[1] - mm[0]) / (bars.length - 1);
numbers.map!(n => bars[cast(int)((n - mm[0]) / div)]).writeln;
}

The output is the same as the Python entry (but it only accepts one series of values at a time).

Elixir[edit]

defmodule RC do
def sparkline(str) do
values = str |> String.split(~r/(,| )+/)
|> Enum.map(&elem(Float.parse(&1), 0))
{min, max} = Enum.min_max(values)
IO.puts Enum.map(values, &(round((&1 - min) / (max - min) * 7 + 0x2581)))
end
end

Usage:

str1 = "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1"
str2 = "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"
 
RC.sparkline(str1)
IO.puts "" # newline
RC.sparkline(str2)
Output:
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

▂▁▄▃▆▅█▇

F#[edit]

open System
open System.Globalization
open System.Text.RegularExpressions
 
let bars = Array.map Char.ToString ("▁▂▃▄▅▆▇█".ToCharArray())
 
while true do
printf "Numbers separated by anything: "
let numbers =
[for x in Regex.Matches(Console.ReadLine(), @"-?\d+(?:\.\d*)?") do yield x.Value]
|> List.map (fun x -> Double.Parse(x, CultureInfo.InvariantCulture))
if numbers.Length = 0 then System.Environment.Exit(0)
if numbers.Length = 1 then
printfn "A sparkline for 1 value is not very useful... ignoring entry"
else
let min, max = List.min numbers, List.max numbers
printfn "min: %5f; max: %5f" min max
let barsCount = float (bars.GetUpperBound(0))
numbers
|> List.map (fun x -> bars.[int ((x - min)/(max - min) * barsCount)])
|> String.Concat
|> printfn "%s"
Output:
Numbers separated by anything: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 
min: 1.000000; max: 8.000000
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Numbers separated by anything: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
min: 0.500000; max: 7.500000
▂▁▄▃▆▅█▇
Numbers separated by anything: 

FALSE[edit]

{
variables:
s: sign (1 or -1)
u: current number
f: current number fraction length
v: current number is valid
t: number of numbers read
x: biggest fraction
y: smallest number (without fraction)
z: biggest number (without fraction)
}
 
{function a: test if top is 0-9, without popping the value, codes 48-57 are in range}
[$$47>\57>~&]a:
 
{function b: test if top is ',' or ' ', without popping the value}
[$$',=\' =|]b:
 
{function c: read a number from the input, given that the first character of the input is already on the stack}
[
1s:0u:0f:0v: {reset values}
 
$'-=[1_s:%^]? {if (it is negative) set the sign value to -1 move to next}
[a;!][48-u;10*+u:1_v:^]# {while (isnumber) do number = number * 10 + decimal and set valid number and move to next}
$'.=[ {if (it is a decimal) move forward and read fraction}
 %^
[a;!][48-u;10*+u:f;1+f:1_v:^]# {while (isnumber) do number = number * 10 + decimal and increase fraction length and set valid number and move to next}
]?
$$'-=\'.=|[0v:]? {if next charachter is a '-' or a '.', set invalid}
]c:
 
{function d: normalize number/fraction from stack to max fraction and push that number}
[
[$x;=~][1+\10*\]# {while (fraction != max) fraction + 1, value * 10}
 % {pop fraction}
]d:
 
0t:
0x:
1_v: { nothing read, so we are still valid }
^[b;!][%^]# {read away any initial separators}
[$1_=~v;&][ {while input != -1 and valid input, leaving input on the stack}
c;! {read a number}
t;1+t:u;s;*f;@ {increase count, push number * sign and fraction length onto the stack and bring input back up}
f;x;>[f;x:]? {set fraction to biggest of current and previous biggest}
[b;!][%^]# {while (isseparator) move forward}
]#
v;~["error at charachter ",]? {if invalid number, tell them when}
v;[ {if last number also valid, do the math}
 % {pop the -1}
t;2*1-q: {var q: points to next value}
0p: {var p: whether min/max have been set}
[q;1+t;>][ {while q + 1 > t}
q;ø {current number}
q;ø {current fraction}
d;! {normalize}
p;[$y;\>[$y:]? $z;>[$z:]?]? {compare min/max}
p;~[1_p:$y:$z:]? {if (first)) set min/max}
q;1-q: {move pointer}
]#
 
t;q: {point q to first value}
[q;0>][ {while q > 0}
q;1-øy;-7*z;y;-/ {(number - minvalue) * 7 / (maxvalue - minvalue), should result in 0..7}
9601+, {print character}
q;1-q: {move pointer}
]#
]?

This implementation can only accept one series of numbers at a time.

Output:
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
▂▁▄▃▆▅█▇

Go[edit]

package main
 
import (
"bufio"
"errors"
"fmt"
"math"
"os"
"regexp"
"strconv"
"strings"
)
 
func main() {
fmt.Println("Numbers please separated by space/commas:")
sc := bufio.NewScanner(os.Stdin)
sc.Scan()
s, n, min, max, err := spark(sc.Text())
if err != nil {
fmt.Println(err)
return
}
if n == 1 {
fmt.Println("1 value =", min)
} else {
fmt.Println(n, "values. Min:", min, "Max:", max)
}
fmt.Println(s)
}
 
var sep = regexp.MustCompile(`[\s,]+`)
 
func spark(s0 string) (sp string, n int, min, max float64, err error) {
ss := sep.Split(s0, -1)
n = len(ss)
vs := make([]float64, n)
var v float64
min = math.Inf(1)
max = math.Inf(-1)
for i, s := range ss {
switch v, err = strconv.ParseFloat(s, 64); {
case err != nil:
case math.IsNaN(v):
err = errors.New("NaN not supported.")
case math.IsInf(v, 0):
err = errors.New("Inf not supported.")
default:
if v < min {
min = v
}
if v > max {
max = v
}
vs[i] = v
continue
}
return
}
if min == max {
sp = strings.Repeat("▄", n)
} else {
rs := make([]rune, n)
f := 8 / (max - min)
for j, v := range vs {
i := rune(f * (v - min))
if i > 7 {
i = 7
}
rs[j] = '▁' + i
}
sp = string(rs)
}
return
}
Output:
Numbers please separated by space/commas:
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
15 values.  Min: 1 Max: 8
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Numbers please separated by space/commas:
1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 
8 values.  Min: 0.5 Max: 7.5
▂▁▄▃▆▅█▇

Numbers please separated by space/commas:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
24 values.  Min: 1 Max: 24
▁▁▁▂▂▂▃▃▃▄▄▄▅▅▅▆▆▆▇▇▇███
Numbers please separated by space/commas:
0 99 101 699 701 800
6 values.  Min: 0 Max: 800
▁▁▂▇██
Numbers please separated by space/commas:
0 -.09 -.11 -.69 -.71 -.8
6 values.  Min: -0.8 Max: 0
██▇▂▁▁
Numbers please separated by space/commas:
3 3 3
3 values.  Min: 3 Max: 3
▄▄▄
Numbers please separated by space/commas:
1e99
1 value = 1e+99
▄
Numbers please separated by space/commas:

strconv.ParseFloat: parsing "": invalid syntax

Groovy[edit]

def sparkline(List<Number> list) {
def (min, max) = [list.min(), list.max()]
def div = (max - min) / 7
list.collect { (char)(0x2581 + (it-min) * div) }.join()
}
def sparkline(String text) { sparkline(text.split(/[ ,]+/).collect { it as Double }) }

Test Code

["1 2 3 4 5 6 7 8 7 6 5 4 3 2 1", "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"].each { dataset ->
println " Dataset: $dataset"
println "Sparkline: ${sparkline(dataset)}"
}
Output:
  Dataset: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
Sparkline: ▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
  Dataset: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
Sparkline: ▂▁▄▃▆▅█▇

Haskell[edit]

import Data.List.Split (splitOneOf)
import Data.Char (chr)
 
 
toSparkLine :: [Double] -> String
toSparkLine xs = map cl xs
where
top = maximum xs
bot = minimum xs
range = top - bot
cl x = chr $ 0x2581 + floor (min 7 ((x - bot) / range * 8))
 
makeSparkLine :: String -> (String, Stats)
makeSparkLine xs = (toSparkLine parsed, stats parsed)
where
parsed = map read $ filter (not . null) $ splitOneOf " ," xs
 
data Stats = Stats
{ minValue, maxValue, rangeOfValues :: Double
, numberOfValues :: Int
}
 
instance Show Stats where
show (Stats mn mx r n) =
"min: " ++
show mn ++
"; max: " ++
show mx ++ "; range: " ++ show r ++ "; no. of values: " ++ show n
 
stats :: [Double] -> Stats
stats xs =
Stats
{ minValue = mn
, maxValue = mx
, rangeOfValues = mx - mn
, numberOfValues = length xs
}
where
mn = minimum xs
mx = maximum xs
 
drawSparkLineWithStats :: String -> IO ()
drawSparkLineWithStats xs = putStrLn sp >> print st
where
(sp, st) = makeSparkLine xs
 
main :: IO ()
main =
mapM_
drawSparkLineWithStats
[ "0, 1, 19, 20"
, "0, 999, 4000, 4999, 7000, 7999"
, "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1"
, "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"
, "3 2 1 0 -1 -2 -3 -4 -3 -2 -1 0 1 2 3"
, "-1000 100 1000 500 200 -400 -700 621 -189 3"
]
Output:
▁▁██
min: 0.0; max: 20.0; range: 20.0; no. of values: 4
▁▁▅▅██
min: 0.0; max: 7999.0; range: 7999.0; no. of values: 6
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
min: 1.0; max: 8.0; range: 7.0; no. of values: 15
▂▁▄▃▆▅█▇
min: 0.5; max: 7.5; range: 7.0; no. of values: 8
█▇▆▅▄▃▂▁▂▃▄▅▆▇█
min: -4.0; max: 3.0; range: 7.0; no. of values: 15
▁▅█▇▅▃▂▇▄▅
min: -1000.0; max: 1000.0; range: 2000.0; no. of values: 10


Or, stripping back a little:

Translation of: Python
import Data.List.Split (splitOneOf)
import Data.List (findIndex)
import Data.Maybe (maybe)
import Control.Arrow ((&&&))
 
sparkLine :: [Float] -> String
sparkLine xs =
let (mn, mx) = (minimum &&& maximum) xs
w = (mx - mn) / 8
lbounds = ((mn +) . (w *)) <$> [1 .. 7]
in fmap (maybe '█' ("▁▂▃▄▅▆▇" !!) . flip findIndex lbounds . flip (>)) xs
 
parseFloats :: String -> [Float]
parseFloats = fmap read . filter (not . null) . splitOneOf " ,"
 
main :: IO ()
main =
mapM_
putStrLn
((sparkLine . parseFloats) <$>
[ "0, 1, 19, 20"
, "0, 999, 4000, 4999, 7000, 7999"
, "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1"
, "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"
])
Output:
▁▁██
▁▁▅▅██
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
▂▁▄▃▆▅█▇

J[edit]

Solution (explicit):
   spkln =: verb define
y spkln~ 4 u:16b2581+i.8 NB. ▁▂▃▄▅▆▇█
 :
'MIN MAX' =. (<./ , >./) y
N =. # x
x {~ <. (N-1) * (y-MIN) % MAX-MIN
)
Solution (tacit):
   spkln =: (4 u:16b2581+i.8)&$: : ([ {~ <:@#@[ <[email protected]* ] (- % >./@[ - ]) <./@])
Solution (look Ma, no hands!):
   spkln =: (u:9601+i.8)&$: : ([ {~ ((<[email protected]* <:@#)~ ((- % (- >./))~ <./)))
Examples:
   spkln 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
   spkln 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
▁▅█▆▅▃▂▇▄▅

Notes: J's grammar automatically normalizes numeric vector inputs which use a mix of whitespace and commas. If we wanted to normalize input ourselves, i.e. take string rather than numeric input (e.g. to make apples-for-apples comparisons with the languages easier) we could simply use ". ("eval") as a preprocessor, as in [email protected]". (which is simple because it's still taking advantage of J's grammar to normalize numeric vectors).

Note also: the font my browser uses to render these sparkline characters looks awful. Other fonts look better.

Java[edit]

 
public class Sparkline
{
String bars="▁▂▃▄▅▆▇█";
public static void main(String[] args)
{
Sparkline now=new Sparkline();
float[] arr={1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1};
now.display1D(arr);
System.out.println(now.getSparkline(arr));
float[] arr1={1.5f, 0.5f, 3.5f, 2.5f, 5.5f, 4.5f, 7.5f, 6.5f};
now.display1D(arr1);
System.out.println(now.getSparkline(arr1));
}
public void display1D(float[] arr)
{
for(int i=0;i<arr.length;i++)
System.out.print(arr[i]+" ");
System.out.println();
}
public String getSparkline(float[] arr)
{
float min=Integer.MAX_VALUE;
float max=Integer.MIN_VALUE;
for(int i=0;i<arr.length;i++)
{
if(arr[i]<min)
min=arr[i];
if(arr[i]>max)
max=arr[i];
}
float range=max-min;
int num=bars.length()-1;
String line="";
for(int i=0;i<arr.length;i++)
{
 
line+=bars.charAt((int)Math.ceil(((arr[i]-min)/range*num)));
}
return line;
}
}
 
Output:
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
1.5 0.5 3.5 2.5 5.5 4.5 7.5 6.5 
▂▁▄▃▆▅█▇


JavaScript[edit]

ES6[edit]

(() => {
'use strict';
 
const main = () => {
 
// sparkLine :: [Num] -> String
const sparkLine = xs => {
const hist = dataBins(8)(xs);
return unlines([
concat(map(
i => '▁▂▃▄▅▆▇█' [i],
hist.indexes
)),
unwords(xs),
[
'Min: ' + hist.min,
'Mean: ' + hist.mean.toFixed(2),
'Median: ' + hist.median,
'Max: ' + hist.max,
].join('\t'),
''
]);
};
 
 
// dataBins :: Int -> [Num] ->
// {indexes:: [Int], min:: Float, max:: Float,
// range :: Float, lbounds :: [Float]}
const dataBins = intBins => xs => {
const
iLast = intBins - 1,
ys = sort(xs),
mn = ys[0],
mx = last(ys),
rng = mx - mn,
w = rng / intBins,
lng = xs.length,
mid = lng / 2,
lbounds = map(
i => mn + (w * i),
enumFromTo(1, iLast)
);
return {
indexes: map(
x => {
const mb = findIndex(b => b > x, lbounds);
return mb.Nothing ? (
iLast
) : mb.Just;
},
xs
),
lbounds: lbounds,
min: mn,
median: even(lng) ? (
sum([ys[mid - 1], ys[mid]]) / 2
) : ys[Math.floor(mid)],
mean: sum(xs) / lng,
max: mx,
range: rng
};
};
 
// numbersFromString :: String -> [Float]
const numbersFromString = s =>
map(x => parseFloat(x, 10),
s.split(/[,\s]+/)
);
 
return unlines(map(
compose(sparkLine, numbersFromString),
[
'0, 1, 19, 20',
'0, 999, 4000, 4999, 7000, 7999',
'1 2 3 4 5 6 7 8 7 6 5 4 3 2 1',
'1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5'
]
));
};
 
// GENERIC FUNCTIONS ----------------------------
 
// Just :: a -> Maybe a
const Just = x => ({
type: 'Maybe',
Nothing: false,
Just: x
});
 
// Nothing :: Maybe a
const Nothing = () => ({
type: 'Maybe',
Nothing: true,
});
 
// compose (<<<) :: (b -> c) -> (a -> b) -> a -> c
const compose = (f, g) => x => f(g(x));
 
// concat :: [[a]] -> [a]
// concat :: [String] -> String
const concat = xs =>
0 < xs.length ? (() => {
const unit = 'string' !== typeof xs[0] ? (
[]
) : '';
return unit.concat.apply(unit, xs);
})() : [];
 
 
// enumFromTo :: (Int, Int) -> [Int]
const enumFromTo = (m, n) =>
Array.from({
length: 1 + n - m
}, (_, i) => m + i);
 
// even :: Int -> Bool
const even = n => 0 === n % 2;
 
// last :: [a] -> a
const last = xs =>
0 < xs.length ? xs.slice(-1)[0] : undefined;
 
// map :: (a -> b) -> [a] -> [b]
const map = (f, xs) =>
(Array.isArray(xs) ? (
xs
) : xs.split('')).map(f);
 
// sort :: Ord a => [a] -> [a]
const sort = xs => xs.slice()
.sort((a, b) => a < b ? -1 : (a > b ? 1 : 0));
 
 
// findIndex :: (a -> Bool) -> [a] -> Maybe Int
const findIndex = (p, xs) => {
const
i = (
'string' !== typeof xs ? (
xs
) : xs.split('')
).findIndex(p);
return -1 !== i ? (
Just(i)
) : Nothing();
};
 
// sum :: [Num] -> Num
const sum = xs => xs.reduce((a, x) => a + x, 0);
 
// unlines :: [String] -> String
const unlines = xs => xs.join('\n');
 
// unwords :: [String] -> String
const unwords = xs => xs.join(' ');
 
// MAIN ---
return main();
})();
Output:
▁▁██
0 1 19 20
Min: 0    Mean: 10.00    Median: 10    Max: 20

▁▁▅▅██
0 999 4000 4999 7000 7999
Min: 0    Mean: 4166.17    Median: 4499.5    Max: 7999

▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
Min: 1    Mean: 4.27    Median: 4    Max: 8

▂▁▄▃▆▅█▇
1.5 0.5 3.5 2.5 5.5 4.5 7.5 6.5
Min: 0.5    Mean: 4.00    Median: 4    Max: 7.5

jq[edit]

def sparkline:
min as $min
| ( (max - $min) / 7 ) as $div
| map( 9601 + (. - $min) * $div )
| implode ;
 
def string2array:
def tidy: select( length > 0 );
[split(" ") | .[] | split(",") | .[] | tidy | tonumber];

Task

( "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1",
  "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"
)  | string2array | sparkline
Output:
$ jq -n -f -r sparkline.jq
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
▂▁▄▃▆▅█▇

Julia[edit]

Works with: Julia version 0.6
function sparklineit(arr::Vector{<:Integer})
sparkchars = '\u2581':'\u2588'
dyn = length(sparkchars)
lo, hi = extrema(arr)
b = @. max(ceil(Int, dyn * (arr - lo) / (hi - lo)), 1)
return join(sparkchars[b])
end
 
v = rand(0:10, 10)
println("$v → ", sparklineit(v))
v = 10rand(10)
println("$(round.(v, 2)) → ", sparklineit(v))
Output:
[6, 3, 9, 5, 1, 10, 0, 1, 3, 6] → ▅▃█▄▁█▁▁▃▅
[0.57, 0.14, 4.73, 6.61, 6.9, 0.8, 9.71, 7.39, 2.75, 5.7] → ▁▁▄▆▆▁█▇▃▅

Kotlin[edit]

Translation of: Java
internal const val bars = "▁▂▃▄▅▆▇█"
internal const val n = bars.length - 1
 
fun <T: Number> Iterable<T>.toSparkline(): String {
var min = Double.MAX_VALUE
var max = Double.MIN_VALUE
val doubles = map { it.toDouble() }
doubles.forEach { i -> when { i < min -> min = i; i > max -> max = i } }
val range = max - min
return doubles.fold("") { line, d -> line + bars[Math.ceil((d - min) / range * n).toInt()] }
}
 
fun String.toSparkline() = replace(",", "").split(" ").map { it.toFloat() }.toSparkline()
 
fun main(args: Array<String>) {
val s1 = "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1"
println(s1)
println(s1.toSparkline())
val s2 = "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"
println(s2)
println(s2.toSparkline())
}
Output:
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
▂▁▄▃▆▅█▇

LiveCode[edit]

command sparklines listOfNums
local utfbase=0x2581
local tStats, utfp, tmin,tmax,trange
put listOfNums into tStats
replace ", " with space in tStats
replace space with comma in tStats
put min(tStats) into tmin
put max(tStats) into tmax
put tmax - tmin into trange
put "Min:" && tmin && tab into plot
put "Max:" && tmax && tab after plot
put "Range:" && trange && tab after plot
put "Mean" && average(tStats) && tab after plot
put "Stdev:" && standardDeviation(tStats) && tab after plot
put "Variance:" && variance(tStats) && return after plot
 
repeat for each item i in tStats
put (round(i - tmin/trange * 7)) + utfbase into utfp
put numToCodepoint(utfp) after plot
end repeat
put plot
end sparklines

Test

sparklines("1 2 3 4 5 6 7 8 7 6 5 4 3 2 1")
Min: 1 	Max: 8 	Range: 7 	Mean 4.266667 	Stdev: 2.250926 	Variance: 5.066667 
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

sparklines("1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5")
Min: 0.5 	Max: 7.5 	Range: 7 	Mean 4 	Stdev: 2.44949 	Variance: 6 
▂▁▄▃▆▅█▇

NetRexx[edit]

/* NetRexx */
options replace format comments java crossref symbols nobinary
 
runSample(arg)
return
 
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
method sparkline(spark) private static
spark = spark.changestr(',', ' ')
bars = '\u2581 \u2582 \u2583 \u2584 \u2585 \u2586 \u2587 \u2588'
barK = bars.words()
nmin = spark.word(1)
nmax = nmin
-- get min & max values
loop iw = 1 to spark.words()
nval = spark.word(iw)
nmin = nval.min(nmin)
nmax = nval.max(nmax)
end iw
range = nmax - nmin + 1
slope = ''
loop iw = 1 to spark.words()
point = Math.ceil((spark.word(iw) - nmin + 1) / range * barK)
slope = slope || bars.word(point)
end iw
return slope nmin nmax range
 
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
method runSample(arg) private static
-- sample data setup
parse arg vals
sparks = 0
sparks[0] = 0
if vals = '' then do
si = sparks[0] + 1; sparks[0] = si; sparks[si] = 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
si = sparks[0] + 1; sparks[0] = si; sparks[si] = '1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5'
end
else do
loop until vals = ''
-- split input on a ! character
parse vals lst '!' vals
si = sparks[0] + 1; sparks[0] = si; sparks[si] = lst
end
end
-- run the samples
loop si = 1 to sparks[0]
vals = sparks[si]
parse sparkline(vals) slope .
say 'Input: ' vals
say 'Sparkline: ' slope
say
end si
 
return
 
Output:
Input:         1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
Sparkline:     ▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

Input:         1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
Sparkline:     ▂▁▄▃▆▅█▇

M2000 Interpreter[edit]

This statement a=cdr(a) make a new array from a excluding the first item, so can be return the empty array (,). In Row$(a) a is passing by value, but is a pointer to array, so we get a pointer to point to same array. When we do the a=cdr(a) we change pointer so variable (a) point to a new array.


The first program use auto arrays (or tuple), so we have to convert to string for output to clipboard (Print dat can be used to print the array as is to screen), and the second program get the input as string, so we have to make it an array at execution time, using then param() for inline parameters in expressions. A Random(param("1,10")) is the same as Random(1,10) (we can use only literal values in param(string_arg)). Because dat get from dat$ only the data, we can use Eval$("("+dat$+")"). Eval$() get all string as an expression for evaluation.


 
Module CheckIt {
Function Row$(a) {
def item$(a)=str$(car(a)#val(0),0)
rep$=item$(a)
while len(a)
rep$+=", "+item$(a)
a=cdr(a)
End While
=rep$
}
Font "Dejavu Sans Mono"
Cls
Const bar$="▁▂▃▄▅▆▇█"
Document doc$
data1=(1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1)
data2=(1.5, 0.5, 3.5, 2.5, 5.5, 4.5, 7.5, 6.5)
SparkLine(data1)
SparkLine(data2)
Clipboard doc$
Sub SparkLine(dat as array)
Local min=dat#min(), range=(dat#max()-dat#min()), range1=7/range
Local item, rep$="Input:"+Row$(dat)+{
}
item=each(dat)
While item
rep$+=Mid$(bar$,(array(item)-min)*range1+1 ,1)
End While
rep$+=" ("+str$(range,1033)+")"
doc$=rep$+{
}
Report rep$
End Sub
}
Checkit
 

Function Param() get a string an put it as inline code in expressions

 
Module CheckIt {
Font "Dejavu Sans Mono"
Cls
Const bar$="▁▂▃▄▅▆▇█"
Document doc$
data1$="1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1"
data2$="1.5, 0.5, 3.5, 2.5, 5.5, 4.5, 7.5, 6.5"
SparkLine(data1$)
SparkLine(data2$)
Clipboard doc$
Sub SparkLine(dat$)
dat=(param(dat$))
Rem dat=eval$("("+dat$+")")
Local min=dat#min(), range=(dat#max()-dat#min()), range1=7/range
Local item, rep$="Input:"+dat$+{
}
item=each(dat)
While item
rep$+=Mid$(bar$,(array(item)-min)*range1+1 ,1)
End While
rep$+=" ("+str$(range,1033)+")"
doc$=rep$+{
}
Report rep$
End Sub
}
Checkit
 

Third program use strings for stack input, which skip coma as white space. We have to pass to current stack, here calling a function (which always have a new stack for values). First we flush the stack (make it empty), then we use Stack Dat$ to parse the dat$ (also empty the string). Last we rtuern an array using array() using as argument a stack object. Read only function [] do two things replace the current stack object with an empty one, and return the old stack.


 
Module CheckIt {
Function ExtractDat(dat$) {
Flush
Stack dat$
=array([])
}
Font "Dejavu Sans Mono"
Cls
Const bar$="▁▂▃▄▅▆▇█"
Document doc$
data1$="1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1"
data2$="1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 "
SparkLine(data1$)
SparkLine(data2$)
Clipboard doc$
Sub SparkLine(dat$)
dat=ExtractDat(dat$)
Rem dat=eval$("("+dat$+")")
Local min=dat#min(), range=(dat#max()-dat#min()), range1=7/range
Local item, rep$="Input:"+dat$+{
}
item=each(dat)
While item
rep$+=Mid$(bar$,(array(item)-min)*range1+1 ,1)
End While
rep$+=" ("+str$(range,1033)+")"
doc$=rep$+{
}
Report rep$
End Sub
}
Checkit
 
Output:
Input:1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁ (7)
Input:1.5, 0.5, 3.5, 2.5, 5.5, 4.5, 7.5, 6.5
▂▁▄▃▆▅█▇ (7)

Mathematica[edit]

toSparkline[data_String] := FromCharacterCode[Round[7 [email protected]@ImportString[data, "Table", "FieldSeparators" -> {" ", ","}]] + 16^^2581];
toSparkline["1 2 3 4 5 6 7 8 7 6 5,4 3 2 1 "]
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

toSparkline[" 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 "]
▂▁▄▃▆▅█▇

Nim[edit]

Translation of: Python
import rdstdin, strutils, unicode
 
const bar = [9601, 9602, 9603, 9604, 9605, 9606, 9607, 9608]
const barcount = float(bar.high)
 
while True:
let
line = readLineFromStdin "Numbers please separated by space/commas: "
numbers = line.split({' ',','}).map(parseFloat)
mn = min(numbers)
mx = max(numbers)
extent = mx - mn
var sparkline = ""
for n in numbers:
let i = int((n-mn) / extent * barcount)
sparkline.add($TRune(bar[i]))
echo "min: ", mn.formatFloat(precision = 0), "; max: ", mx.formatFloat(precision = 0)
echo sparkline
Output:
Numbers please separated by space/commas: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
min: 1; max: 8
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Numbers please separated by space/commas: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
min: 0.5; max: 7.5
▂▁▄▃▆▅█▇

Perl[edit]

binmode(STDOUT, ":utf8");
our @sparks=map {chr} 0x2581 .. 0x2588;
sub sparkline(@) {
my @n=map {0+$_} grep {length} @_ or return "";
my($min,$max)=($n[0])x2;
if (@n>1) {
for (@n[1..$#n]) {
if ($_<$min) { $min=$_ }
elsif ($_>$max) { $max=$_ }
}
}
my $sparkline="";
for(@n) {
my $height=int( $max==$min ? @sparks/2 : ($_-$min)/($max-$min)*@sparks );
$height=$#sparks if $height>$#sparks;
$sparkline.=$sparks[$height];
}
my $summary=sprintf "%d values; range %s..%s", scalar(@n), $min, $max;
return wantarray ? ($summary, "\n", $sparkline, "\n") : $sparkline;
}
 
# one number per line
# print sparkline( <> );
 
# in scalar context, get just the sparkline without summary or trailing newline
# my $sl=sparkline( <> ); print $sl;
 
# one sparkline per line
print sparkline( split /[\s,]+/ ) while <>;
 
Output:
$ echo 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 | perl -Mstrict -w spark.pl # strict and warn not needed but it passes both
15 values; range 1..8
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

$ echo 0 1 19 20 | perl spark.pl
4 values; range 0..20
▁▁██

$ echo 0 999 4000 4999 7000 7999  | perl spark.pl
6 values; range 0..7999
▁▁▅▅██

$ echo 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 | perl spark.pl
8 values; range 0.5..7.5
▂▁▄▃▆▅█▇

$ echo -9e9 1.2345 6e5  | perl spark.pl
3 values; range -9000000000..600000
▁██

$ echo 12 12 12 12 | perl spark.pl
4 values; range 12..12
▅▅▅▅

Most Perl builds have IEEE-754 floats:

$ echo {1..8}e307  | perl spark.pl
8 values; range 1e+307..8e+307
▁▂▃▄▅▆▇█

$ echo {1..8}e308  | perl spark.pl  
8 values; range 1e+308..Inf
▁▁▁▁▁▁▁▁

$ echo -{1..8}e307 | perl spark.pl  
8 values; range -8e+307..-1e+307
█▇▆▅▄▃▂▁

Perl 6[edit]

constant @bars = '▁' ... '█';
while prompt 'Numbers separated by anything: ' -> $_ {
my @numbers = map +*, .comb(/ '-'? [[\d+ ['.' \d*]?] | ['.' \d+]] /);
my ($mn,$mx) = @numbers.minmax.bounds;
say "min: $mn.fmt('%5f'); max: $mx.fmt('%5f')";
say @bars[ @numbers.map: { @bars * ($_ - $mn) / ($mx - $mn) min @bars - 1 } ].join;
}
Output:
Numbers separated by anything: 9 18 27 36 45 54 63 72 63 54 45 36 27 18 9
9 18 27 36 45 54 63 72 63 54 45 36 27 18 9
min: 9.000000; max: 72.000000
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Numbers separated by anything: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
1.5 0.5 3.5 2.5 5.5 4.5 7.5 6.5
min: 0.500000; max: 7.500000
▂▁▄▃▆▅█▇
Numbers separated by anything: 3 2 1 0 -1 -2 -3 -4 -3 -2 -1 0 1 2 3  
min: -4.000000; max: 3.000000
█▇▆▅▄▃▂▁▂▃▄▅▆▇█
Numbers separated by anything: ^D

Phix[edit]

Works fine on Linux, with or without unicode_console.e as that does little apart from check environment settings for clues, but on my windows box, on which it invokes kernel32/SetConsoleOutputCP(CP_UTF8), unicode_console.e improves it only slightly, getting just two of the eight characters right. Changing the font on the windows(10) console to "NSimSum" or "SimSun-ExtB" (manually, by right clicking on the title bar and selecting properties/fonts) improved things considerably.

include builtins\unicode_console.e   -- (0.8.0+)
 
constant tests = {"0 1 19 20", "0 0 1 1",
"0 999 4000 4999 7000 7999", "1 1 2 2 3 3",
"1 2 3 4 5 6 7 8 7 6 5 4 3 2 1",
"1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"}
 
for i=1 to length(tests) do
sequence ti = split_any(tests[i]," ,",no_empty:=true)
for j=1 to length(ti) do
{{ti[j]}} = scanf(ti[j],"%f")
end for
atom mn = min(ti),
mx = max(ti),
range = mx-mn
printf(1,"Min :%g, Max :%g, Range :%g\n",{mn,mx,range})
 
if unicode_console() then
for j=1 to length(ti) do
ti[j] = #2581 + min(7,floor((ti[j]-mn)/range*8))
end for
printf(1,"%s\n",{utf32_to_utf8(ti)})
else
puts(1,"unicode is not supported\n")
end if
end for
Output:
Min :0, Max :20, Range :20
▁▁██
Min :0, Max :1, Range :1
▁▁██
Min :0, Max :7999, Range :7999
▁▁▅▅██
Min :1, Max :3, Range :2
▁▁▅▅██
Min :1, Max :8, Range :7
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Min :0.5, Max :7.5, Range :7
▂▁▄▃▆▅█▇

PicoLisp[edit]

(de sparkLine (Lst)
(let (Min (apply min Lst) Max (apply max Lst) Rng (- Max Min))
(for N Lst
(prin
(char (+ 9601 (*/ (- N Min) 7 Rng)) ) ) )
(prinl) ) )

Test:

(sparkLine (str "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1"))
(sparkLine (scl 1 (str "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5")))

Output:

▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
▂▁▄▃▆▅█▇

Python[edit]

# -*- coding: utf-8 -*-
 
# Unicode: 9601, 9602, 9603, 9604, 9605, 9606, 9607, 9608
bar = '▁▂▃▄▅▆▇█'
barcount = len(bar)
 
def sparkline(numbers):
mn, mx = min(numbers), max(numbers)
extent = mx - mn
sparkline = ''.join(bar[min([barcount - 1,
int((n - mn) / extent * barcount)])]
for n in numbers)
return mn, mx, sparkline
 
if __name__ == '__main__':
import re
 
for line in ("0 0 1 1; 0 1 19 20; 0 999 4000 4999 7000 7999;"
"1 2 3 4 5 6 7 8 7 6 5 4 3 2 1;"
"1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 ").split(';'):
print("\nNumbers:", line)
numbers = [float(n) for n in re.split(r'[\s,]+', line.strip())]
mn, mx, sp = sparkline(numbers)
print(' min: %5f; max: %5f' % (mn, mx))
print(" " + sp)
Output:
Numbers: 0 0 1 1
  min: 0.000000; max: 1.000000
  ▁▁██

Numbers:  0 1 19 20
  min: 0.000000; max: 20.000000
  ▁▁██

Numbers:  0 999 4000 4999 7000 7999
  min: 0.000000; max: 7999.000000
  ▁▁▅▅██

Numbers: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
  min: 1.000000; max: 8.000000
  ▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

Numbers: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 
  min: 0.500000; max: 7.500000
  ▂▁▄▃▆▅█▇


Or, by composition of pure functions, with type comments for the reader, rather than the compiler.

To vary the approach, the block used is derived from the option type (Just x | Nothing) result of a search over 7 zero-indexed lower bounds [0..6].

If a lower bound whose value exceeds that of the given data point can be found, we just use the index of that bound.

If the search result is 'not found' (Nothing), then we use the highest (nominally 8th, or index 7) block.

import re
 
 
# sparkLine :: [Float] -> [String]
def sparkLine(xs):
def go(xs):
ys = sorted(xs)
mn, mx = ys[0], ys[-1]
n = len(xs)
mid = n // 2
w = (mx - mn) / 8
lbounds = list(map(lambda i: mn + (w * i), range(1, 8)))
return [
''.join(map(
lambda x: maybe('█')(
lambda i: '▁▂▃▄▅▆▇'[i]
)(findIndex(lambda b: b > x)(lbounds)),
xs
)),
' '.join(map(str, xs)),
'\t'.join([
'Min ' + str(mn),
'Mean ' + str(round(mean(xs), 2)),
'Median ' + str(
(ys[mid - 1] + ys[mid]) / 2 if even(n) else (
ys[mid]
)
),
'Max ' + str(mx)
]),
''
]
return go(xs) if xs else []
 
 
# main :: IO ()
def main():
print(
unlines(map(
compose(compose(unlines)(sparkLine))(readFloats),
[
"0, 1, 19, 20",
"0, 999, 4000, 4999, 7000, 7999",
"1 2 3 4 5 6 7 8 7 6 5 4 3 2 1",
"1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"
]
))
)
 
 
# GENERIC -------------------------------------------------
 
 
# Just :: a -> Maybe a
def Just(x):
return {'type': 'Maybe', 'Nothing': False, 'Just': x}
 
 
# Nothing :: Maybe a
def Nothing():
return {'type': 'Maybe', 'Nothing': True}
 
 
# compose (<<<) :: (b -> c) -> (a -> b) -> a -> c
def compose(g):
return lambda f: lambda x: g(f(x))
 
 
# even :: Int -> Bool
def even(x):
return 0 == x % 2
 
 
# findIndex :: (a -> Bool) -> [a] -> Maybe Int
def findIndex(p):
def go(xs):
try:
return Just(next(
i for i, v in enumerate(xs) if p(v)
))
except StopIteration:
return Nothing()
return lambda xs: go(xs)
 
 
# maybe :: b -> (a -> b) -> Maybe a -> b
def maybe(v):
return lambda f: lambda m: v if m.get('Nothing') else (
f(m.get('Just'))
)
 
 
# mean :: [Num] -> Float
def mean(xs):
return sum(xs) / float(len(xs))
 
 
# readFloats :: String -> [Float]
def readFloats(s):
return list(map(
float,
re.split('[\s,]+', s)
))
 
 
# unlines :: [String] -> String
def unlines(xs):
return '\n'.join(xs)
 
 
# TEST -------------------------------------------------
if __name__ == '__main__':
main()
Output:
▁▁██
0.0 1.0 19.0 20.0
Min 0.0    Mean 10.0    Median 10.0    Max 20.0

▁▁▅▅██
0.0 999.0 4000.0 4999.0 7000.0 7999.0
Min 0.0    Mean 4166.17    Median 4499.5    Max 7999.0

▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0
Min 1.0    Mean 4.27    Median 4.0    Max 8.0

▂▁▄▃▆▅█▇
1.5 0.5 3.5 2.5 5.5 4.5 7.5 6.5
Min 0.5    Mean 4.0    Median 4.0    Max 7.5

REXX[edit]

version 1[edit]

Translation of: NetRexx
Works with: ooRexx
Works with: Regina version 3.4
/* Rexx */
 
parse arg aaa
call runSample aaa
return
 
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sparkline:
procedure
parse arg spark
spark = changestr(',', spark, ' ')
bars = '▁ ▂ ▃ ▄ ▅ ▆ ▇ █'
barK = words(bars)
nmin = word(spark, 1)
nmax = nmin
-- get min & max values
do iw = 1 to words(spark)
nval = word(spark, iw)
nmin = min(nval, nmin)
nmax = max(nval, nmax)
end iw
range = nmax - nmin + 1
slope = ''
do iw = 1 to words(spark)
point = ceiling((word(spark, iw) - nmin + 1) / range * barK)
slope = slope || word(bars, point)
end iw
return slope nmin nmax range
 
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ceiling:
procedure
parse arg ceil
return trunc(ceil) + (ceil > 0) * (ceil \= trunc(ceil))
floor:
procedure
parse arg flor
return trunc(flor) - (flor < 0) * (flor \= trunc(flor))
 
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
runSample:
procedure
-- sample data setup
parse arg vals
sparks = 0
sparks.0 = 0
if vals = '' then do
si = sparks.0 + 1; sparks.0 = si; sparks.si = 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
si = sparks.0 + 1; sparks.0 = si; sparks.si = '1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5'
end
else do
do until vals = ''
-- split input on a ! character
parse var vals lst '!' vals
si = sparks.0 + 1; sparks.0 = si; sparks.si = lst
end
end
-- run the samples
do si = 1 to sparks.0
vals = sparks.si
parse value sparkline(vals) with slope .
say 'Input: ' vals
say 'Sparkline: ' slope
say
end si
 
return
 
Output:
Input:         1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
Sparkline:     ▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

Input:         1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
Sparkline:     ▂▁▄▃▆▅█▇

version 2[edit]

(A re-work of REXX version 1)

This version works on:

  • all versions of Regina (which may or may not support single line comments)
  • R4 and ROO (which don't support single line comments)
  • older versions of REXX such as PC/REXX and Personal REXX which don't support the changestr BIF

This version also removed some dead code, simplified the program structure and subroutines, added comments.

Single line comments were introduced in Regina 3.4.

Regina 3.6 introduced the options:   single_line_comments and noSingle_line_comments.

It should also be noted that the CMS and TSO versions of REXX (and practically all others) don't support single line comments.

/*REXX program displays a  sparkline  (spark graph)  for a group of values.             */
if arg()==0 then do /*Optional arguments? Then use defaults*/
call sparkGraph 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
call sparkGraph '1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5'
end
else call sparkGraph arg(1)
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
ceil: procedure; parse arg ?; _=trunc(?); return _+(?>0)*(?\=_)
/*──────────────────────────────────────────────────────────────────────────────────────*/
sparkGraph: procedure; parse arg x; say ' input: ' x /*echo the values.*/
x= translate(x, ' ', ",") /*remove any superfluous commas. */
$= '▁▂▃▄▅▆▇█'; L= length($) /*chars to be used for the graph.*/
xmin= word(x, 1); xmax= xmin /*assume a minimum and a maximum.*/
 
do n=2 to words(x); _= word(x, n) /*examine successive words in X.*/
xmin= min(_, xmin) /*find the minimum value in X. */
xmax= max(_, xmax) /* " " maximum " " " */
end /*n*/
z=
do j=1 for words(x) /*build the output spark graph. */
z= z || substr($, ceil( ( word(x, j) -xmin+1) / (xmax -xmin+1) * L), 1)
end /*j*/
 
say 'output: ' z; say; return /*show the output, + a blank line*/
output   when using the default inputs:
 input:  1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
output:  ▁▂▃▄▅▆▇█▇▆▅▄▃▂▁

 input:  1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
output:  ▂▁▄▃▆▅█▇

Racket[edit]

 
#lang racket (require syntax/parse)
 
(define bars "▁▂▃▄▅▆▇█")
(define bar-count (string-length bars))
 
(define (sparks str)
(define ns (map string->number (string-split str #rx"[ ,]" #:repeat? #t)))
(define mn (apply min ns))
(define bar-width (/ (- (apply max ns) mn) (- bar-count 1)))
(apply string (for/list ([n ns]) (string-ref bars (exact-floor (/ (- n mn) bar-width))))))
 
(sparks "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1")
(sparks "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5")
 
Output:
 
"▁▂▃▄▅▆▇█▇▆▅▄▃▂▁"
"▂▁▄▃▆▅█▇"
 

Ruby[edit]

Translation of: Perl 6
with added protection for input like "0 0 0 0".
bar = ('▁'..'█').to_a 
loop {print 'Numbers please separated by space/commas: '
numbers = gets.split(/[\s,]+/).map(&:to_f)
min, max = numbers.minmax
puts "min: %5f; max: %5f"% [min, max]
div = (max - min) / (bar.size - 1)
puts min == max ? bar.last*numbers.size : numbers.map{|num| bar[((num - min) / div).to_i]}.join
}
Output:
Used Go testcases
Numbers please separated by space/commas: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
min: 1.000000; max: 8.000000
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Numbers please separated by space/commas: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 
min: 0.500000; max: 7.500000
▂▁▄▃▆▅█▇
Numbers please separated by space/commas: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
min: 1.000000; max: 24.000000
▁▁▁▁▂▂▂▃▃▃▄▄▄▄▅▅▅▆▆▆▇▇▇█
Numbers please separated by space/commas: 0 99 101 699 701 800
min: 0.000000; max: 800.000000
▁▁▁▇▇█
Numbers please separated by space/commas: 0 -.09 -.11 -.69 -.71 -.8
min: -0.800000; max: 0.000000
█▇▇▁▁▁
Numbers please separated by space/commas: 3 3 3
min: 3.000000; max: 3.000000
███
Numbers please separated by space/commas: 1e99
min: 999999999999999967336168804116691273849533185806555472917961779471295845921727862608739868455469056.000000; max: 999999999999999967336168804116691273849533185806555472917961779471295845921727862608739868455469056.000000
█

Rust[edit]

 
const BARS: &'static str = "▁▂▃▄▅▆▇█";
 
fn print_sparkline(s: &str){
let v = BARS.chars().collect::<Vec<char>>();
let line: String = s.replace(",", " ").split(" ")
.filter(|x| !x.is_empty())
.map(|x| v[x.parse::<f64>().unwrap().ceil() as usize - 1])
.collect();
println!("{:?}", line);
}
 
fn main(){
let s1 = "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1";
print_sparkline(s1);
let s2 = "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5";
print_sparkline(s2);
}
 
Output:

"▁▂▃▄▅▆▇█▇▆▅▄▃▂▁"

"▂▁▄▃▆▅█▇"

S-lang[edit]

 
% Just to demonstrate alternate ways of defining unicode:
private variable spchrs = "\u{2581}\u{2582}\u{2583}\u{2584}\u{2585}\u{2586}\u{2587}\u{2588}";
private variable spchrs_alt = "▁▂▃▄▅▆▇█";
 
define sparkline(arrstr)
{
variable a = strtok(arrstr, " \t,"), alen = length(a), out = "";
a = atof(a);
variable amin = min(a), amax = max(a), span = amax - amin, i, d;
 
_for i (0, alen-1, 1)
if (span != 0) {
 % int() truncates; adding .5 here to round:
d = int((a[i] - amin) * 7.0 / span + 0.5);
out += substr(spchrs, d+1, 1);
}
else
out += substr(spchrs, 4, 1);
 
print(out);
}
 
if (not _slang_utf8_ok) error("Sorry, UTF8 mode is not on.");
sparkline("1 2 3 4 5 6 7 8 7 6 5 4 3 2 1");
sparkline("1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5 ");
 
Output:

"▁▂▃▄▅▆▇█▇▆▅▄▃▂▁"

"▂▁▄▃▆▅█▇"

Scala[edit]

def mkSparks( numStr:String ) : String =
numStr.split( "[\\s,]+" ).map(_.toFloat) match {
case v if v.isEmpty => ""
case v if v.length == 1 => "\u2581"
case v =>
(for( i <- v;
s = "\u2581\u2582\u2583\u2584\u2585\u2586\u2587\u2588".toCharArray;
d = (v.max - v.min) / (s.length - 1)
) yield s( ((i - v.min) / d).toInt)).mkString
}
 
println( mkSparks( "1 2 3 4 5 6 7 8 7 6 5 4 3 2 1" ) )
println( mkSparks( "1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5" ) )
 
// A random test...
println( mkSparks( Stream.continually( math.abs(util.Random.nextInt % 8)).take(64).mkString(" ") ))
Output:
 ▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
 ▂▁▄▃▆▅█▇
 ▆▁▅▄▁▅▅▇▂▅▆▄▆▃█▄▃▅▇▂▅▆▂▃▇▆▅▇▅█▂▅▄▂▃▇▁▃▇▇▃▁▆▆▂▄▁▄▂▁▁▃▇▆▃▂▆▂▆▇▁▁▆▃

Seed7[edit]

$ include "seed7_05.s7i";
include "scanfile.s7i";
include "float.s7i";
include "utf8.s7i";
 
const func array float: readDataLine is func
result
var array float: data is 0 times 0.0;
begin
write("Numbers separated by anything: ");
IN.bufferChar := getc(IN);
skipSpace(IN);
while IN.bufferChar <> '\n' do
data &:= float parse getNumber(IN);
skipSpace(IN);
if IN.bufferChar = ',' then
IN.bufferChar := getc(IN);
end if;
skipSpace(IN);
end while;
end func;
 
 
const proc: main is func
local
const string: bars is "▁▂▃▄▅▆▇█";
var array float: data is 0 times 0.0;
var float: min is 0.0;
var float: max is 0.0;
var float: number is 0.0;
var integer: index is 0;
begin
OUT := STD_UTF8_OUT;
data  := readDataLine;
while length(data) >= 1 do
min := data[1];
max := data[1];
for number range data do
if number < min then
min := number;
end if;
if number > max then
max := number;
end if;
end for;
for number range data do
index := succ(min(trunc((number - min) * 8.0 / max), 7));
write(bars[index]);
end for;
writeln;
data  := readDataLine;
end while;
end func;
Output:
Numbers separated by anything: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Numbers separated by anything: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
▂▁▄▃▆▅█▇
Numbers separated by anything: 

Sidef[edit]

Translation of: Ruby
var bar = @('▁'..'█');
loop {
print 'Numbers, please, separated by space/commas: ';
var numbers = read(String).trim.split(/[\s,]+/).map{.to_n};
var (min, max) = numbers.minmax;
say "min: %5f; max: %5f"%(min, max);
var div = ((max - min) / bar.end);
say (min == max ? bar.last*numbers.len : numbers.map{|num| bar[(num - min) / div]}.join);
}
Output:
Numbers, please, separated by space/commas: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
min: 1.000000; max: 8.000000
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Numbers, please, separated by space/commas: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
min: 0.500000; max: 7.500000
▂▁▄▃▆▅█▇

Tcl[edit]

Works with: Tcl version 8.6
package require Tcl 8.6
 
proc extractValues {series} {
return [regexp -all -inline {\d+(?:\.\d*)?|\.\d+} $series]
}
proc renderValue {min max value} {
set band [expr {int(8*($value-$min)/(($max-$min)*1.01))}]
return [format "%c" [expr {0x2581 + $band}]]
}
proc sparkline {series} {
set values [extractValues $series]
set min [tcl::mathfunc::min {*}$values]
set max [tcl::mathfunc::max {*}$values]
return [join [lmap v $values {renderValue $min $max $v}] ""]
}

Demonstrating:

set data {
"1 2 3 4 5 6 7 8 7 6 5 4 3 2 1"
"1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5"
}
foreach series $data {
puts "Series: $series"
puts "Sparkline: [sparkline $series]"
}
Output:
Series: 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
Sparkline: ▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Series: 1.5, 0.5 3.5, 2.5 5.5, 4.5 7.5, 6.5
Sparkline: ▂▁▄▃▆▅█▇

zkl[edit]

var sparks=[0x2581..0x2588].apply("toString",-8); // int.toString(-8)-->UTF-8
var sl=(sparks.len()-1);
 
fcn sparkLine(xs){
min:=(0.0).min(xs); max:=(0.0).max(xs); // min/max are float reguardless of xs
range:=max-min; // float
println("Range [",min,"-",max,"]", xs);
xs.pump(String,'wrap(x){ sparks[(x - min)*sl/range] }).println();
}
one:="1 2 3 4 5 6 7 8 7 6 5 4 3 2 1".split(" ").apply("toInt");
two:=("1.5, 0.5 3.5, 2.5 5.5 4.5 7.5, 6.5" - ",").split(" ").apply("toFloat");
sparkLine(one); sparkLine(two);
Output:
Range [1-8]: L(1,2,3,4,5,6,7,8,7,6,5,4,3,2,1)
▁▂▃▄▅▆▇█▇▆▅▄▃▂▁
Range [0.5-7.5]: L(1.5,0.5,3.5,2.5,5.5,4.5,7.5,6.5)
▂▁▄▃▆▅█▇