feat(stats/incr): add nancovariance accumulator #5980

Adithya-jh · 2025-03-11T21:23:58Z

type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes. report:

task: lint_filenames status: passed
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task: lint_markdown status: na
task: lint_package_json status: passed
task: lint_repl_help status: passed
task: lint_javascript_src status: passed
task: lint_javascript_cli status: na
task: lint_javascript_examples status: passed
task: lint_javascript_tests status: passed
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task: lint_c_examples status: na
task: lint_c_benchmarks status: na
task: lint_c_tests_fixtures status: na
task: lint_shell status: na
task: lint_typescript_declarations status: na
task: lint_typescript_tests status: na
task: lint_license_headers status: passed ---

Resolves #5554.

Description

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This pull request:

This pull request adds the nancovariance module, which computes an incremental sample covariance while ignoring input pairs that contain NaN values.

Related Issues

Does this pull request have any related issues?

This pull request:

resolves [RFC]: add stats/incr/nancovariance #5554

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Read, understood, and followed the contributing guidelines.

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stdlib-bot · 2025-03-11T21:25:40Z

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/nancovariance	$\color{green}139/139$ $\color{green}+100.00\%$	$\color{green}15/15$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}139/139$ $\color{green}+100.00\%$

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

kgryte · 2025-03-12T07:29:43Z

lib/node_modules/@stdlib/stats/incr/nancovariance/lib/index.js

+/**
+* Compute an incremental sample covariance while ignoring NaN values.
+*
+* @module @stdlib/stats/incr/nancovariance


Suggested change

* @module @stdlib/stats/incr/nancovariance

kgryte · 2025-03-12T07:29:56Z

lib/node_modules/@stdlib/stats/incr/nancovariance/lib/index.js

+* @module @stdlib/stats/incr/nancovariance
+*
+* @example
+* var incrnancount = require( '@stdlib/stats/incr/nancovariance' );


This example is incorrect.

kgryte · 2025-03-12T07:30:21Z

lib/node_modules/@stdlib/stats/incr/nancovariance/lib/main.js

@@ -0,0 +1,87 @@
+/* eslint-disable stdlib/jsdoc-no-space-aligned-asterisks */


Do NOT disable this lint rule. The lint rule is telling you explicitly our conventions.

kgryte · 2025-03-12T07:30:36Z

lib/node_modules/@stdlib/stats/incr/nancovariance/lib/main.js

+// MAIN //
+
+/**
+ * Returns an accumulator function which incrementally computes a sample covariance.


This alignment is incorrect and does not follow our conventions.

kgryte · 2025-03-12T07:31:13Z

lib/node_modules/@stdlib/stats/incr/nancovariance/lib/main.js

+ * // returns 0
+ */
+function nancovariance() {
+	var meanX = 0.0;


This implementation is not what we want. The implementation should be a thin wrapper around incr/covariance.

kgryte · 2025-03-12T07:31:31Z

lib/node_modules/@stdlib/stats/incr/nancovariance/package.json

@@ -0,0 +1,60 @@
+{
+    "name": "@stdlib/stats/incr/nancovariance",


The indentation in this file is off. Should be 2-space indentation.

kgryte · 2025-03-12T07:32:21Z

lib/node_modules/@stdlib/stats/incr/nancovariance/test/test.js

+	t.end();
+});
+
+// Additional tests...


In order for this PR to move forward, you need to add the additional tests. I recommend you simply reuse and modify the tests in incr/covariance.

kgryte

Left an initial round of comments.

kgryte · 2025-03-12T07:33:27Z

You are also missing the following files:

README.md
docs/types/index.d.ts
docs/types/test.ts

Adithya-jh · 2025-03-12T16:43:40Z

Sure i will look into all the changes.
Thanks for reviewing.

--- type: pre_commit_static_analysis_report description: Results of running static analysis checks when committing changes. report: - task: lint_filenames status: passed - task: lint_editorconfig status: passed - task: lint_markdown status: na - task: lint_package_json status: passed - task: lint_repl_help status: passed - task: lint_javascript_src status: passed - task: lint_javascript_cli status: na - task: lint_javascript_examples status: passed - task: lint_javascript_tests status: passed - task: lint_javascript_benchmarks status: passed - task: lint_python status: na - task: lint_r status: na - task: lint_c_src status: na - task: lint_c_examples status: na - task: lint_c_benchmarks status: na - task: lint_c_tests_fixtures status: na - task: lint_shell status: na - task: lint_typescript_declarations status: na - task: lint_typescript_tests status: na - task: lint_license_headers status: passed ---

Adithya-jh · 2025-03-12T19:17:59Z

Hi @kgryte
i have made all the changes mentioned.
could u review and tell , if there is anything missing !

stdlib-bot reviewed Mar 11, 2025

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kgryte reviewed Mar 12, 2025

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kgryte added Needs Changes Pull request which needs changes before being merged. and removed Needs Review A pull request which needs code review. labels Mar 12, 2025

Adithya-jh force-pushed the feature/nancovariance branch from fe8b96e to e965bf2 Compare March 12, 2025 19:12

Adithya-jh requested a review from kgryte March 13, 2025 11:58

stdlib-bot added the Needs Review A pull request which needs code review. label Mar 13, 2025

		@@ -0,0 +1,87 @@
		/* eslint-disable stdlib/jsdoc-no-space-aligned-asterisks */

		@@ -0,0 +1,60 @@
		{
		"name": "@stdlib/stats/incr/nancovariance",

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Adithya-jh commented Mar 11, 2025 •

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