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{{alias}}( [mx, my] )
Returns an accumulator function which incrementally computes a sample
Pearson product-moment correlation distance.
The correlation distance is defined as one minus the Pearson product-moment
correlation coefficient and, thus, resides on the interval [0,2].
If provided values, the accumulator function returns an updated sample
correlation distance. If not provided values, the accumulator function
returns the current sample correlation distance.
If provided `NaN` or a value which, when used in computations, results in
`NaN`, the accumulated value is `NaN` for all future invocations.
Parameters
----------
mx: number (optional)
Known mean.
my: number (optional)
Known mean.
Returns
-------
acc: Function
Accumulator function.
Examples
--------
> var accumulator = {{alias}}();
> var d = accumulator()
null
> d = accumulator( 2.0, 1.0 )
1.0
> d = accumulator( -5.0, 3.14 )
~2.0
> d = accumulator()
~2.0
See Also
--------
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