40 lines
891 B
Plaintext
40 lines
891 B
Plaintext
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{{alias}}()
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Returns an accumulator function which incrementally computes a weighted
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arithmetic mean.
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If provided arguments, the accumulator function returns an updated weighted
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mean. If not provided arguments, the accumulator function returns the
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current weighted mean.
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If provided `NaN` or a value which, when used in computations, results in
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`NaN`, the accumulated value is `NaN` for all future invocations.
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The accumulator function accepts two arguments:
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- x: value
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- w: weight
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Returns
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-------
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acc: Function
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Accumulator function.
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Examples
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--------
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> var accumulator = {{alias}}();
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> var mu = accumulator()
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null
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> mu = accumulator( 2.0, 1.0 )
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2.0
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> mu = accumulator( 2.0, 0.5 )
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2.0
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> mu = accumulator( 3.0, 1.5 )
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2.5
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> mu = accumulator()
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2.5
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See Also
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--------
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