feat: add `lapack/base/dptts2` by iampratik13 · Pull Request #13703 · stdlib-js/stdlib

iampratik13 · 2026-07-27T20:23:26Z

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feat: add lapack/base/dptts2

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stdlib-bot · 2026-07-27T20:26:21Z

Coverage Report

Package	Statements	Branches	Functions	Lines
lapack/base/dptts2	$\\color{green}350/350$ $\\color{green}+0.00\\%$	$\\color{green}24/24$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}350/350$ $\\color{green}+0.00\\%$

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

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Planeshifter · 2026-08-28T08:05:56Z

+* @param {NonNegativeInteger} N - order of the tridiagonal matrix `A`
+* @param {NonNegativeInteger} nrhs - number of right-hand sides (i.e., the number of columns of the matrix `B`)
+* @param {Float64Array} D - the `N` diagonal elements of the diagonal matrix `D` from the factorization of `A`
+* @param {integer} sd - stride length for `D`
+* @param {NonNegativeInteger} od - starting index for `D`
+* @param {Float64Array} E - the `N-1` subdiagonal elements of the unit bidiagonal factor `L` from the factorization of `A`
+* @param {integer} se - stride length for `E`
+* @param {NonNegativeInteger} oe - starting index for `E`
+* @param {Float64Array} B - input matrix (overwritten by the solution matrix `X`)
+* @param {integer} sb1 - stride of the first dimension of `B`
+* @param {integer} sb2 - stride of the second dimension of `B`
+* @param {NonNegativeInteger} ob - starting index for `B`
+* @returns {Float64Array} solution matrix `X` (stored in `B`)
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var D = new Float64Array( [ 4.0, 4.75, 5.157894736842105 ] );
+* var E = new Float64Array( [ 0.25, 0.42105263157894735 ] );
+* var B = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+*
+* dptts2( 3, 1, D, 1, 0, E, 1, 0, B, 1, 3, 0 );
+* // B => <Float64Array>[ ~0.2041, ~0.1837, ~0.4388 ]
+*/
+function dptts2( N, nrhs, D, sd, od, E, se, oe, B, sb1, sb2, ob ) { // eslint-disable-line max-params
+	return base( N, nrhs, D, sd, od, E, se, oe, B, sb1, sb2, ob );
+}


Rename these to match base.js — strideD, offsetD, strideE, offsetE, strideB1, strideB2, offsetB — instead of the abbreviated forms. Every other lapack/base package (dpttrf, dgttrf, dlacpy, etc.) uses the full names throughout ndarray.js, docs, and README; this file should be consistent. Update docs/types/index.d.ts, docs/repl.txt, and README.md too.

Generated by Claude Code

iampratik13 requested a review from a team July 27, 2026 20:23

stdlib-bot added LAPACK Issue or pull request related to the Linear Algebra Package (LAPACK). Needs Review A pull request which needs code review. labels Jul 27, 2026

iampratik13 marked this pull request as draft July 27, 2026 20:30

stdlib-bot removed the Needs Review A pull request which needs code review. label Jul 27, 2026

iampratik13 mentioned this pull request Jul 27, 2026

Weekly Standup (2026-07-27) stdlib-js/meetings#145

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iampratik13 marked this pull request as ready for review July 28, 2026 19:45

stdlib-bot added the Needs Review A pull request which needs code review. label Jul 28, 2026

iampratik13 added Feature Issue or pull request for adding a new feature. JavaScript Issue involves or relates to JavaScript. GSoC Google Summer of Code. gsoc: 2026 Google Summer of Code (2026). labels Jul 28, 2026

anandkaranubc and others added 2 commits August 2, 2026 03:11

Merge branch 'develop' into lapack/dptts2

6141b36

Planeshifter added the review: 5 label Aug 28, 2026 — with Claude

Planeshifter reviewed Aug 28, 2026

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kgryte added review: 3 and removed review: 5 labels Aug 29, 2026

Planeshifter added the automated-review label Sep 1, 2026 — with Claude

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feat: add `lapack/base/dptts2` - #13703

feat: add `lapack/base/dptts2`#13703
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