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{{alias}}()
Returns an accumulator function which incrementally updates a count,
ignoring `NaN` values.
If provided a value, the accumulator function returns an updated count. If
not provided a value, the accumulator function returns the current count.
Returns
-------
acc: Function
Accumulator function.
Examples
--------
> var accumulator = {{alias}}();
> var v = accumulator()
0
> v = accumulator( 2.0 )
1
> v = accumulator( -5.0 )
2
> v = accumulator()
2
See Also
--------
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