Averages/Simple moving average: Difference between revisions
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(Edited fiddle to produce correct results.) |
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===Using reduce/filter=== |
===Using reduce/filter=== |
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{{incorrect|Javascript|routine is called with a list of multiple numbers rather than being called with individual numbers in succession.}} |
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[http://jsfiddle.net/79xe381e/ JS Fiddle] |
[http://jsfiddle.net/79xe381e/ JS Fiddle] |
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<lang javascript>// single-sided |
<lang javascript>// single-sided |
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Array.prototype.simpleSMA=function(N) { |
Array.prototype.simpleSMA=function(N) { |
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return this.map( |
return this.map( |
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function(el,index, _arr) { |
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if(i<N-1) return NaN; |
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return _arr.filter( |
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return v.filter(function(x2,i2) { return i2<=i && i2>i-N; }).reduce(function(a,b){ return a+b; })/N; |
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function(x2,i2) { |
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}); }; |
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return i2 <= index && i2 > index - N; |
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}) |
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.reduce( |
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function(current, last, index, arr){ |
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return (current + last); |
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})/index || 1; |
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}); |
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}; |
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g=[1,2,3,4,5,8, |
g=[0,1,2,3,4,5,6,7,8,9,10]; |
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console.log(g.simpleSMA(3)) |
console.log(g.simpleSMA(3)); |
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console.log(g.simpleSMA(5)) |
console.log(g.simpleSMA(5)); |
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console.log(g.simpleSMA(g.length));</lang> |
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{{out}} |
{{out}} |
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<pre> |
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<pre>[NaN, NaN, 2, 3, 4, 5.666666666666667, 6, 5.666666666666667] |
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[ |
[1, 1, 1.5, 2, 2.25, 2.4, 2.5, 2.5714285714285716, 2.625, 2.6666666666666665, 2.7] |
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[1, 1, 1.5, 2, 2.5, 3, 3.3333333333333335, 3.5714285714285716, 3.75, 3.888888888888889, 4] |
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[1, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5] |
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</pre> |
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=={{header|Julia}}== |
=={{header|Julia}}== |
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