feat: adding stats/incr/nanmmse

[satansin123]

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Resolves #5599.

Description

What is the purpose of this pull request?

This pull request:

• Adds the @stdlib/stats/incr/nanmmse package, which computes an incremental mean while handling NaN values by skipping them.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: add stats/incr/nanmmse #5599

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No.

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• Read, understood, and followed the contributing guidelines.

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Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/nanmmse	$\color{green}150/150$ $\color{green}+100.00\%$	$\color{green}8/8$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}150/150$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.

[hrshya]

The Implementation is wrong what you need to do is create a thin wrapper around the stats/incr/mmse.

[hrshya]

Suggested change

	Returns an accumulator `function` which incrementally computes a moving [mean squared error][mean-squared-error]. The `window` parameter defines the number of values over which to compute the moving [mean squared error][mean-squared-error].
	Returns an accumulator `function` which incrementally computes a moving [mean squared error][mean-squared-error]. The `window` parameter defines the number of values over which to compute the moving [mean squared error][mean-squared-error], ignoring `NaN` values.

[hrshya]

We need to create a thin wrapper around the @stdlib/stats/incr/mmse. So there is no need to implement it from scratch.

[satansin123]

hi @hrshya, i have styled as per your request, please review.

[hrshya]

Just some minor changes. Rest, the PR looks good!

[hrshya]

This module is not being used so you can remove it.

[hrshya]

This condition is being handled in mmse so there is no need to check it here.

[satansin123]

@hrshya its also done, thanks for the review

[hrshya]

Great work! Time to wait for a maintainer to merge this PR :)