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{{alias}}( W )
Returns an accumulator function which incrementally computes a moving
arithmetic mean of squared absolute values.
The `W` parameter defines the number of values over which to compute the
moving mean.
If provided a value, the accumulator function returns an updated moving
mean. If not provided a value, the accumulator function returns the current
moving mean.
As `W` values are needed to fill the window buffer, the first `W-1` returned
values are calculated from smaller sample sizes. Until the window is full,
each returned value is calculated from all provided values.
Parameters
----------
W: integer
Window size.
Returns
-------
acc: Function
Accumulator function.
Examples
--------
> var accumulator = {{alias}}( 3 );
> var m = accumulator()
null
> m = accumulator( 2.0 )
4.0
> m = accumulator( -5.0 )
14.5
> m = accumulator( 3.0 )
~12.67
> m = accumulator( 5.0 )
~19.67
> m = accumulator()
~19.67
See Also
--------
|
