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{{alias}}()
Returns an accumulator function which incrementally computes a statistical
summary.
If provided a value, the accumulator function returns an updated summary. If
not provided a value, the accumulator function returns the current summary.
The returned summary is an object containing the following fields:
- count: count.
- max: maximum value.
- min: minimum value.
- range: range.
- midrange: mid-range.
- sum: sum.
- mean: arithmetic mean.
- variance: unbiased sample variance.
- stdev: corrected sample standard deviation.
- skewness: corrected sample skewness.
- kurtosis: corrected sample excess kurtosis.
For long running accumulations or accumulations of large numbers, care
should be taken to prevent overflow.
Returns
-------
acc: Function
Accumulator function.
Examples
--------
> var accumulator = {{alias}}();
> var s = accumulator()
{}
> s = accumulator( 2.0 )
{...}
> s = accumulator( -5.0 )
{...}
> s = accumulator()
{...}
See Also
--------
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