feat: add `stats/incr/mkurtosis` by aryan7071 · Pull Request #10689 · stdlib-js/stdlib

aryan7071 · 2026-03-03T18:29:02Z

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Resolves #14

Description

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This pull request:

feat: add stats/incr/mkurtosis

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#{{TODO: add related issue number}}

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aryan7071 · 2026-03-03T18:31:09Z

/stdlib update-copyright-years

stdlib-bot · 2026-03-03T18:33:18Z

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/mkurtosis	$\color{red}362/366$ $\color{green}+98.91%$	$\color{red}30/32$ $\color{green}+93.75%$	$\color{green}3/3$ $\color{green}+100.00%$	$\color{red}362/366$ $\color{green}+98.91%$

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

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aryan7071 · 2026-03-03T19:07:29Z

/stdlib update-copyright-years

stdlib-bot · 2026-03-03T19:08:17Z

/stdlib update-copyright-years

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aryan7071 · 2026-03-03T19:10:17Z

/stdlib update-copyright-years

stdlib-bot · 2026-03-03T19:11:24Z

/stdlib update-copyright-years

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Planeshifter

Thanks for opening a PR!

Planeshifter · 2026-03-09T05:19:23Z

+  "dependencies": {
+    "@stdlib/array/float64": "^0.0.x",
+    "@stdlib/assert/is-positive-integer": "^0.0.x",
+    "@stdlib/math/base/assert/is-nan": "^0.0.x",
+    "@stdlib/string/format": "^0.0.x"
+  },
+  "devDependencies": {
+    "@stdlib/constants/float64/eps": "^0.0.x",
+    "@stdlib/math/base/special/abs": "^0.0.x",
+    "@stdlib/math/base/special/max": "^0.0.x",
+    "@stdlib/random/base/randu": "^0.0.x"


dependencies and devDependencies should be empty objects {}. These fields are auto-generated during package creation.

Planeshifter · 2026-03-09T05:19:26Z

+## See Also
+
+-   <span class="package-name">[`@stdlib/stats/incr/kurtosis`][@stdlib/stats/incr/kurtosis]</span><span class="delimiter">: </span><span class="description">compute a corrected sample excess kurtosis incrementally (all data, no window).</span>
+-   <span class="package-name">[`@stdlib/stats/incr/mskewness`][@stdlib/stats/incr/mskewness]</span><span class="delimiter">: </span><span class="description">compute a moving corrected sample skewness incrementally.</span>


This section is auto-generated. Remove it.

Planeshifter · 2026-03-09T05:19:30Z

+	// NaN at position 2 (0-indexed), window=4.
+	data = [ 1.0, 2.0, NaN, -2.0, -3.0, 4.0, 5.0 ];
+	acc = mkurtosis( 4 );
+	for ( i = 0; i < data.length; i++ ) {
+		v = acc( data[ i ] );
+		if ( i >= 3 && i <= 5 ) {
+			// NaN in the window: positions 2-5.
+			t.ok( isnan( v ), 'returns NaN while NaN is in the window (i='+i+')' );
+		}
+	}
+	t.end();
+});


Missing assertions for i=2 (NaN enters the window, should return NaN) and i=6 (NaN leaves the window, should return a finite value matching naive computation). Without the latter, a broken recompute() goes undetected.

Planeshifter · 2026-03-09T05:19:34Z

+{
+	mkurtosis(); // $ExpectError
+}


Missing a test block for providing an invalid number of arguments. Per convention in other moving accumulator packages (e.g., mvariance), this should be:

// The compiler throws an error if the function is provided an invalid number of arguments... { mkurtosis(); // $ExpectError mkurtosis( 4, 5 ); // $ExpectError }

This replaces the current standalone block that only tests mkurtosis(); // $ExpectError.

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aryan7071 · 2026-03-14T18:12:33Z

/stdlib update-copyright-years

stdlib-bot added Statistics Issue or pull request related to statistical functionality. Needs Review A pull request which needs code review. labels Mar 3, 2026

stdlib-bot added the bot: In Progress Pull request is currently awaiting automation. label Mar 3, 2026

chore: update copyright years

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aryan7071 added 2 commits March 3, 2026 12:06

Planeshifter requested changes Mar 9, 2026

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Planeshifter added Needs Changes Pull request which needs changes before being merged. and removed Needs Review A pull request which needs code review. labels Mar 9, 2026

Planeshifter changed the title ~~feat: add stats/incr/mkurtosis~~ feat: add stats/incr/mkurtosis Mar 9, 2026

stdlib-bot added the bot: In Progress Pull request is currently awaiting automation. label Mar 14, 2026

chore: update copyright years

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aryan7071 mentioned this pull request Mar 19, 2026

[RFC]: Provide APIs for computing Fast Fourier Transforms stdlib-js/google-summer-of-code#191

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