feat: add C implementation for stats/base/dists/poisson/mgf

[AadishJ]

Resolves #3791.

Description

What is the purpose of this pull request?

This pull request:

• Adds a C implementation of the poisson mgf.
• Includes benchmarks for the C implementation.
• Provides examples demonstrating the usage of the poisson mgf in C.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: Add C implementation for @stdlib/stats/base/dists/poisson/mgf #3791

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.

---

@stdlib-js/reviewers

[AadishJ]

/stdlib update-copyright-years

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/poisson/mgf	$\color{green}246/246$ $\color{green}+100.00\%$	$\color{green}15/15$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}246/246$ $\color{green}+100.00\%$

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

[Planeshifter]

/stdlib merge

[Planeshifter]

LGTM!

[stdlib-bot]

PR Commit Message

feat: add C implementation for `stats/base/dists/poisson/mgf`

PR-URL: https://github.com/stdlib-js/stdlib/pull/4626
Closes: https://github.com/stdlib-js/stdlib/issues/3791

Co-authored-by: Aadish Jain <firestorm@AadishJain>
Co-authored-by: Philipp Burckhardt <[email protected]>
Co-authored-by: stdlib-bot <[email protected]>
Reviewed-by: Philipp Burckhardt <[email protected]>
Signed-off-by: Philipp Burckhardt <[email protected]>

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

[kgryte]

@Planeshifter Why do these tests not match test.mgf.js? The tolerances have also been increased. I suggest revisiting this test file.

[Planeshifter]

Aligned the tolerances; but in this case, the native test file is actually more comprehensive (I had to do some clean-up before merge) and the main one incorrectly referred to x parameter instead of t.

[AadishJ]

Hey please let me know if I can help

[Planeshifter]

@AadishJ Thanks for the offer! Will ping you on any other open PRs should I see any discrepancies that we should look into. In this case, I mainly took the tests from the test.native.js and updated the main test file accordingly, while then tweaking the names to avoid a reference to "range", since lambda should be referred to as the mean parameter.