42 lines
956 B
Plaintext
42 lines
956 B
Plaintext
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{{alias}}( [out] )
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Returns an accumulator function which incrementally computes an arithmetic
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mean and unbiased sample variance.
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If provided a value, the accumulator function returns updated accumulated
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values. If not provided a value, the accumulator function returns the
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current accumulated values.
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If provided `NaN`, the accumulated values are equal to `NaN` for all future
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invocations.
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Parameters
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----------
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out: Array|TypedArray (optional)
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Output array.
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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 mv = accumulator()
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null
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> mv = accumulator( 2.0 )
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[ 2.0, 0.0 ]
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> mv = accumulator( -5.0 )
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[ -1.5, 24.5 ]
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> mv = accumulator( 3.0 )
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[ 0.0, 19.0 ]
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> mv = accumulator( 5.0 )
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[ 1.25, ~18.92 ]
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> mv = accumulator()
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[ 1.25, ~18.92 ]
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See Also
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--------
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