Cumulative standard deviation: Difference between revisions
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<pre>0, 1, 0.942809041582063, 0.866025403784439, 0.979795897113273, 1, 1.39970842444753, 2</pre> |
<pre>0, 1, 0.942809041582063, 0.866025403784439, 0.979795897113273, 1, 1.39970842444753, 2</pre> |
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=={{header|lua}}== |
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Uses a closure. Translation of JavaScript. |
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<lang lua>function stdev() |
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local sum, sumsq, k = 0,0,0 |
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return function(n) |
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sum, sumsq, k = sum + n, sumsq + n^2, k+1 |
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return math.sqrt((sumsq / k) - (sum/k)^2) |
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end |
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end |
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ldev = stdev() |
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for i, v in ipairs{2,4,4,4,5,5,7,9} do |
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print(ldev(v)) |
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end</lang> |
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=={{header|Objective-C}}== |
=={{header|Objective-C}}== |
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