feat: add implementation of `stats/base/dists/wald/kurtosis` by bhargava-d16 · Pull Request #10216 · stdlib-js/stdlib

bhargava-d16 · 2026-02-11T13:08:38Z

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: passed
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: missing_dependencies
task: lint_c_examples status: missing_dependencies
task: lint_c_benchmarks status: missing_dependencies
task: lint_c_tests_fixtures status: na
task: lint_shell status: na
task: lint_typescript_declarations status: passed
task: lint_typescript_tests status: passed
task: lint_license_headers status: passed ---

Progresses #209

Description

What is the purpose of this pull request?

This pull request:

adds an implementation of the kurtosis for the Wald (Inverse Gaussian) distribution.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

RFC: add the Wald distribution #209

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

Yes
No

If you answered "yes" above, how did you use AI assistance?

Code generation (e.g., when writing an implementation or fixing a bug)
Test/benchmark generation
Documentation (including examples)
Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

@stdlib-js/reviewers

Signed-off-by: Bhargav Dabhade <bhargava2005dabhade@gmail.com> --- 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: passed - 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: missing_dependencies - task: lint_c_examples status: missing_dependencies - task: lint_c_benchmarks status: missing_dependencies - task: lint_c_tests_fixtures status: na - task: lint_shell status: na - task: lint_typescript_declarations status: passed - task: lint_typescript_tests status: passed - task: lint_license_headers status: passed ---

stdlib-bot · 2026-02-11T13:11:32Z

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/wald/kurtosis	$\color{green}184/184$ $\color{green}+0.00%$	$\color{green}10/10$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}184/184$ $\color{green}+0.00%$

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

Planeshifter

Thanks for opening this PR!

Planeshifter · 2026-02-12T04:26:59Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md

+
+The [excess kurtosis][kurtosis] for a [Wald][wald-distribution] random variable with mean `μ` and shape parameter `λ > 0` is
+
+<!-- <equation class="equation" label="eq:wald_expectation" align="center" raw="\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}" alt="Expected value for a Wald distribution."> -->


Looks like this equation label and alt text were carried over from the wald/mean package. The label should reference kurtosis, not expectation.

Suggested change

Planeshifter · 2026-02-12T04:27:02Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md

+\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}
+```
+
+<!-- <div class="equation" align="center" data-raw-text="\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}" data-equation="eq:wald_expectation">


Same copy-paste issue here — should reference kurtosis, not expectation.

Suggested change

<!-- <div class="equation" align="center" data-raw-text="\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}" data-equation="eq:wald_expectation">

<!-- <div class="equation" align="center" data-raw-text="\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}" data-equation="eq:wald_kurtosis">

Planeshifter · 2026-02-12T04:27:05Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md

+
+#### kurtosis( mu, lambda )
+
+Returns the  [excess kurtosis][kurtosis] for a [Wald][wald-distribution] with parameters mu (mean) and lambda (shape parameter).


A couple of small things here: there's a double space after "the", the word "distribution" is missing after the Wald link, and mu/lambda should be in backticks. Compare with wald/mean's README:

Suggested change

Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] with parameters mu (mean) and lambda (shape parameter).

Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] distribution with parameters `mu` (mean) and `lambda` (shape parameter).

Planeshifter · 2026-02-12T04:27:08Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md

+
+#### stdlib_base_dists_wald_kurtosis( mu, lambda )
+
+Returns the  [excess kurtosis][kurtosis] for a [Wald][wald-distribution] with parameters mu (mean) and lambda (shape parameter).


Same issues as line 58 — double space, missing "distribution", and missing backticks around parameter names. For the C API description, the pattern from wald/mean is slightly different (uses "with mean mu and shape parameter lambda"):

Suggested change

Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] with parameters mu (mean) and lambda (shape parameter).

Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] distribution with mean `mu` and shape parameter `lambda`.

Planeshifter · 2026-02-12T04:27:10Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.js

+	t.end();
+});
+
+tape( 'the function returns the expected value of a Wald distribution', function test( t ) {


This description was carried over from wald/mean — should say "excess kurtosis" instead of "expected value".

Suggested change

tape( 'the function returns the expected value of a Wald distribution', function test( t ) {

tape( 'the function returns the excess kurtosis of a Wald distribution', function test( t ) {

Planeshifter · 2026-02-12T04:27:12Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.native.js

+	t.end();
+});
+
+tape( 'the function returns the expected value of a Wald distribution', opts, function test( t ) {


Same copy-paste issue as in test.js — should say "excess kurtosis" instead of "expected value".

Suggested change

tape( 'the function returns the expected value of a Wald distribution', opts, function test( t ) {

tape( 'the function returns the excess kurtosis of a Wald distribution', opts, function test( t ) {

--- 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: passed - task: lint_package_json status: na - task: lint_repl_help status: na - task: lint_javascript_src status: na - task: lint_javascript_cli status: na - task: lint_javascript_examples status: na - task: lint_javascript_tests status: passed - task: lint_javascript_benchmarks status: na - 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: passed - task: lint_typescript_tests status: na - task: lint_license_headers status: passed ---

bhargava-d16 · 2026-02-13T01:03:29Z

@Planeshifter I have made the requested changes. Please let me know if there are any further changes to be made

Planeshifter · 2026-02-13T02:43:13Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md

+
+> [Wald][wald-distribution] distribution [excess kurtosis][kurtosis].
+
+!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->


Looks like the opening < got dropped from this HTML comment, so it'll render as visible text in the README instead of being hidden.

Suggested change

!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

Planeshifter · 2026-02-13T02:43:18Z

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md

+
+#### stdlib_base_dists_wald_kurtosis( mu, lambda )
+
+Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] distribution with  parameters mean `mu` and shape parameter `lambda`.


There's still a double space between "with" and "parameters" here. Let's do:

Suggested change

Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] distribution with parameters mean `mu` and shape parameter `lambda`.

Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] distribution with mean `mu` and shape parameter `lambda`.

--- 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: passed - task: lint_package_json status: na - task: lint_repl_help status: na - task: lint_javascript_src status: na - task: lint_javascript_cli status: na - task: lint_javascript_examples status: na - task: lint_javascript_tests status: na - task: lint_javascript_benchmarks status: na - 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: passed - task: lint_typescript_tests status: na - task: lint_license_headers status: passed ---

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/repl.txt

Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>

Planeshifter

Thank you!

stdlib-bot · 2026-02-14T05:45:13Z

PR Commit Message

feat: add implementation of `stats/base/dists/wald/kurtosis`

PR-URL: https://github.com/stdlib-js/stdlib/pull/10216
Ref: https://github.com/stdlib-js/stdlib/issues/209

Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>
Signed-off-by: Bhargav Dabhade <bhargava2005dabhade@gmail.com>
Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>

Please review the above commit message and make any necessary adjustments.

stdlib-bot added Statistics Issue or pull request related to statistical functionality. Needs Review A pull request which needs code review. labels Feb 11, 2026

Planeshifter requested changes Feb 12, 2026

View reviewed changes

Planeshifter added Needs Changes Pull request which needs changes before being merged. and removed Needs Review A pull request which needs code review. labels Feb 12, 2026

bhargava-d16 requested a review from Planeshifter February 12, 2026 07:03

stdlib-bot added the Needs Review A pull request which needs code review. label Feb 12, 2026

Planeshifter requested changes Feb 13, 2026

View reviewed changes

Planeshifter removed the Needs Review A pull request which needs code review. label Feb 13, 2026

bhargava-d16 requested a review from Planeshifter February 13, 2026 05:44

stdlib-bot added the Needs Review A pull request which needs code review. label Feb 13, 2026

Planeshifter reviewed Feb 14, 2026

View reviewed changes

lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/repl.txt Show resolved Hide resolved

style: add trailing empty line

293d397

Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>

Planeshifter approved these changes Feb 14, 2026

View reviewed changes

Planeshifter added the Ready To Merge A pull request which is ready to be merged. label Feb 14, 2026

stdlib-bot removed Needs Review A pull request which needs code review. Needs Changes Pull request which needs changes before being merged. labels Feb 14, 2026

Planeshifter merged commit 3088f39 into stdlib-js:develop Feb 14, 2026
32 checks passed

stdlib-bot removed the Ready To Merge A pull request which is ready to be merged. label Feb 14, 2026


		The [excess kurtosis][kurtosis] for a [Wald][wald-distribution] random variable with mean `μ` and shape parameter `λ > 0` is

		<!-- <equation class="equation" label="eq:wald_expectation" align="center" raw="\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}" alt="Expected value for a Wald distribution."> -->

	<!-- <div class="equation" align="center" data-raw-text="\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}" data-equation="eq:wald_expectation">
	<!-- <div class="equation" align="center" data-raw-text="\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}" data-equation="eq:wald_kurtosis">


		#### kurtosis( mu, lambda )

		Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] with parameters mu (mean) and lambda (shape parameter).


		#### stdlib_base_dists_wald_kurtosis( mu, lambda )

		Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] with parameters mu (mean) and lambda (shape parameter).

	tape( 'the function returns the expected value of a Wald distribution', function test( t ) {
	tape( 'the function returns the excess kurtosis of a Wald distribution', function test( t ) {


		> [Wald][wald-distribution] distribution [excess kurtosis][kurtosis].

		!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

	!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
	<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

Uh oh!

Conversation

bhargava-d16 commented Feb 11, 2026

Description

Related Issues

Questions

Other

Checklist

AI Assistance

Disclosure

Uh oh!

stdlib-bot commented Feb 11, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Coverage Report

Uh oh!

Planeshifter left a comment

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

bhargava-d16 commented Feb 13, 2026

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Planeshifter left a comment

Choose a reason for hiding this comment

Uh oh!

stdlib-bot commented Feb 14, 2026

PR Commit Message

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

stdlib-bot commented Feb 11, 2026 •

edited

Loading