selectRandomWeighted

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Description needed
Groups:: Arrays

Syntax:

Syntax needed

Parameters:

valuesAndWeights: Array - array in format [value1, weight1, value2, weight2...], where:

Return Value:

Return value needed

Syntax:: values selectRandomWeighted weights
Parameters:: values: Array - array of Anything
: weights: Array - array of Numbers
Return Value:: Anything - random weighted value or Nothing if any of arrays is empty or all weights are 0

Example 1:: _randomWeightedElement = selectRandomWeighted [1,0.1,2,0.2,3,1.3,4,2.4,5,7.5];
Example 2:: _randomWeightedElement = [1,2,3,4,5] selectRandomWeighted [0.1,0.2,1.3,2.4,7.5];

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Posted on June 26, 2017 - 19:17 (UTC)

A 100000 runs of the following code:

_values = [0,1,2,3,4,5,6,7,8,9];
_weights = [0.109,0.65,0.01,1.01,1.24,0,1.59,0.09,1.15,0.55];
_result = _values selectRandomWeighted _weights;

Gave this result:

0 - 0
0.01 - 144
0.09 - 1409
0.109 - 1633
0.55 - 8673
0.65 - 10127
1.01 - 15668
1.15 - 18059
1.24 - 19518
1.59 - 24769

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