feat: add `stats/incr/nanmpe` by officiallyanee · Pull Request #10012 · stdlib-js/stdlib

officiallyanee · 2026-01-31T17:55:36Z

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Resolves #5603 .

Description

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adds stats/incr/nanmpe .

Related Issues

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This pull request has the following related issues:

Progresses [RFC]: add incremental accumulators for handling NaN values in stats/incr/* (tracking issue) #5966

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stdlib-bot · 2026-01-31T17:57:57Z

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/nanmpe	$\color{green}129/129$ $\color{green}+0.00%$	$\color{green}7/7$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}129/129$ $\color{green}+0.00%$

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

Planeshifter

Looks pretty good overall, thanks!

Planeshifter · 2026-03-09T05:38:01Z

+
+## Notes
+
+-   Input values are **not** type checked. If provided `NaN`, the accumulated value is `NaN` for **all** future invocations **until** a non-`NaN` value pair is provided. If non-numeric inputs are possible, you are advised to type check and handle accordingly **before** passing the value to the accumulator function.


This note contradicts the actual behavior and the very next line. NaN inputs are skipped — they don't contaminate the accumulator. Please consult other incremental nan packages for the expected notes.

Planeshifter · 2026-03-09T05:38:04Z

+```
+
+<!-- <div class="equation" align="center" data-raw-text="\operatorname{MPE}  = \frac{100}{n} \sum_{i=0}^{n-1} \frac{a_i - f_i}{a_i}" data-equation="eq:mean_percentage_error">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@2acedf866c9a4f1353af22f95780535612c5ee06/lib/node_modules/@stdlib/stats/incr/nampe/docs/img/equation_mean_percentage_error.svg" alt="Equation for the mean percentage error.">


Typo: nampe should be nanmpe.

Suggested change

<img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@2acedf866c9a4f1353af22f95780535612c5ee06/lib/node_modules/@stdlib/stats/incr/nampe/docs/img/equation_mean_percentage_error.svg" alt="Equation for the mean percentage error.">

<img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@2acedf866c9a4f1353af22f95780535612c5ee06/lib/node_modules/@stdlib/stats/incr/nanmpe/docs/img/equation_mean_percentage_error.svg" alt="Equation for the mean percentage error.">

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officiallyanee · 2026-03-10T10:10:01Z

@Planeshifter thanks for the review!

I addressed your comments & noticed the js example in README didn't match index.js so i updated that too.

Kindly take a look, thanks!

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stdlib-bot added Statistics Issue or pull request related to statistical functionality. Needs Review A pull request which needs code review. Good First PR A pull request resolving a Good First Issue. labels Jan 31, 2026

Planeshifter requested changes Mar 9, 2026

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officiallyanee requested a review from Planeshifter March 10, 2026 10:13

stdlib-bot added the Needs Review A pull request which needs code review. label Mar 10, 2026

officiallyanee mentioned this pull request Mar 17, 2026

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feat: add `stats/incr/nanmpe`#10012

feat: add `stats/incr/nanmpe`#10012
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		## Notes

		- Input values are not type checked. If provided `NaN`, the accumulated value is `NaN` for all future invocations until a non-`NaN` value pair is provided. If non-numeric inputs are possible, you are advised to type check and handle accordingly before passing the value to the accumulator function.

	<img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@2acedf866c9a4f1353af22f95780535612c5ee06/lib/node_modules/@stdlib/stats/incr/nampe/docs/img/equation_mean_percentage_error.svg" alt="Equation for the mean percentage error.">
	<img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@2acedf866c9a4f1353af22f95780535612c5ee06/lib/node_modules/@stdlib/stats/incr/nanmpe/docs/img/equation_mean_percentage_error.svg" alt="Equation for the mean percentage error.">

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