Chebyshev coefficients: Difference between revisions
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m (→{{header|Wren}}: Minor tidy) |
m (→{{header|Sidef}}: updated code) |
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<syntaxhighlight lang="ruby">func chebft (callback, a, b, n) { |
<syntaxhighlight lang="ruby">func chebft (callback, a, b, n) { |
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var bma = (0.5 * b-a) |
var bma = (0.5 * b-a) |
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var bpa = (0.5 * b+a) |
var bpa = (0.5 * b+a) |
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var pi_n = (( |
var pi_n = ((^n »+» 0.5) »*» (Num.pi / n)) |
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var f = (pi_n |
var f = (pi_n »cos()» »*» bma »+» bpa «call« callback) |
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var sums = ( |
var sums = (^n «run« {|i| f »*« ((pi_n »*» i) »cos()») «+» }) |
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sums |
sums »*» (2/n) |
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} |
} |
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chebft(func(v){v.cos}, 0, 1, 10) |
for v in (chebft(func(v){v.cos}, 0, 1, 10)) { |
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say ("%+.10e" % v) |
say ("%+.10e" % v) |
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}</syntaxhighlight> |
}</syntaxhighlight> |
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-1.0022591709e-11 |
-1.0022591709e-11 |
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</pre> |
</pre> |
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=={{header|Swift}}== |
=={{header|Swift}}== |
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