Stem-and-leaf plot/Data generator: Difference between revisions
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(Should produce a bell curve distribution for each hump, now.) |
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sub genhump |
sub genhump |
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{ |
{ |
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my $offset = |
my ($offset, $width, $pointcount, $slope) = @_; |
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my $width = shift; |
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my $pointcount = shift; |
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my $slope = shift; |
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my $diecount = $slope; |
my $diecount = $slope; |
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my @ret; |
my @ret; |
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foreach (1 .. $pointcount) |
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while($pointcount-- > 0) |
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{ |
{ |
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my $point = $offset; |
my $point = $offset; |
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foreach (1 .. $diecount) |
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{ |
{ |
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$point += rand($range * 10000) / 10000; |
$point += rand($range * 10000) / 10000; |
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} |
} |
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my @list = () |
my @list = (&genhump(8, 3, 5, 3), |
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push @list, &genhump(8, 3, 5, 3); |
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my @shuffled = &shuffle(@list); |
my @shuffled = &shuffle(@list); |
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print " |
print "@shuffled\n";</lang> |
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foreach ( @shuffled ); |
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</lang> |
Revision as of 05:18, 14 December 2009
Written to generate data sets for the Stem-and-leaf plot task.
<lang perl>#!/usr/bin/perl use strict;
- The shuffle is taken from http://rosettacode.org/wiki/Knuth_shuffle
sub shuffle
{my @a = @_; foreach my $n (1 .. $#a) {my $k = int rand $n + 1; $k == $n or @a[$k, $n] = @a[$n, $k];} return @a;}
- The greater your pointcount to your width, the more sparse your result.
sub genhump { my ($offset, $width, $pointcount, $slope) = @_;
my $diecount = $slope; my $range = $width / $diecount;
my @ret; foreach (1 .. $pointcount) { my $point = $offset; foreach (1 .. $diecount) { $point += rand($range * 10000) / 10000; }
push @ret, int($point); }
return @ret; }
my @list = (&genhump(8, 3, 5, 3),
&genhump(12, 3, 5, 6));
my @shuffled = &shuffle(@list);
print "@shuffled\n";</lang>