46 lines
1.1 KiB
Plaintext
46 lines
1.1 KiB
Plaintext
|
|
{{alias}}( W )
|
|
Returns an accumulator function which incrementally computes a moving
|
|
harmonic mean.
|
|
|
|
The `W` parameter defines the number of values over which to compute the
|
|
moving harmonic mean.
|
|
|
|
If provided a value, the accumulator function returns an updated moving
|
|
harmonic mean. If not provided a value, the accumulator function returns the
|
|
current moving harmonic 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 v = accumulator()
|
|
null
|
|
> v = accumulator( 2.0 )
|
|
2.0
|
|
> v = accumulator( 5.0 )
|
|
~2.86
|
|
> v = accumulator( 3.0 )
|
|
~2.90
|
|
> v = accumulator( 5.0 )
|
|
~4.09
|
|
> v = accumulator()
|
|
~4.09
|
|
|
|
See Also
|
|
--------
|
|
|