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{{alias}}()
Returns an accumulator function which incrementally computes the mean
squared error (MSE).
If provided input values, the accumulator function returns an updated mean
squared error. If not provided input values, the accumulator function
returns the current mean squared error.
If provided `NaN` or a value which, when used in computations, results in
`NaN`, the accumulated value is `NaN` for all future invocations.
Returns
-------
acc: Function
Accumulator function.
Examples
--------
> var accumulator = {{alias}}();
> var m = accumulator()
null
> m = accumulator( 2.0, 3.0 )
1.0
> m = accumulator( -5.0, 2.0 )
25.0
> m = accumulator()
25.0
See Also
--------
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