DLAPMR(3)

💅 DLAPMR(3) — rearranging rows like it’s her job ✨

🎀 NAME 🎀

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/dlapmr.f — bestie, this whole page is literally about that source file. It’s giving LAPACK source-realness 💖

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✨ SYNOPSIS ✨

Functions/Subroutines

• subroutine DLAPMR (forwrd, m, n, x, ldx, k) — DLAPMR rearranges rows of a matrix as specified by a permutation vector. 👑

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🫶 Function/Subroutine Documentation 🫶

💫 subroutine DLAPMR

subroutine DLAPMR (logical forwrd, integer m, integer n, double precision,
       dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)

DLAPMR rearranges rows of a matrix as specified by a permutation vector. No cap. 🦋

🌈 Purpose 🌈

Okay so here’s the tea, bestie: DLAPMR rearranges the rows of the M by N matrix X as specified by the permutation K(1),K(2),...,K(M) of the integers 1,...,M. Main character row-shuffling energy 💅

If FORWRD = .TRUE., that’s a forward permutation:

X(K(I),*) is moved X(I,*) for I = 1,2,...,M.

If FORWRD = .FALSE., we go backward permutation:

X(I,*) is moved to X(K(I),*) for I = 1,2,...,M.

That’s literally the whole vibe check: the forward line says X(K(I),*) is moved X(I,*), and the backward line says X(I,*) is moved to X(K(I),*). Iykyk. 🌈

🌸 Parameters 🌸

• FORWRD — FORWRD is LOGICAL; = .TRUE. means forward permutation, = .FALSE. means backward permutation. Pick your lane, bestie. ✨
• M — M is INTEGER; the number of rows of the matrix X. M >= 0. Rows gotta row. 🍓
• N — N is INTEGER; the number of columns of the matrix X. N >= 0. Cols gotta col. 🌸
• X — X is DOUBLE PRECISION array, dimension (LDX,N); on entry, the M by N matrix X. On exit, X contains the permuted matrix X. She came, she saw, she permuted. 👑
• LDX — LDX is INTEGER; the leading dimension of the array X, LDX >= MAX(1,M). ngl, respect the leading dimension, fr fr. 💜
• K — K is INTEGER array, dimension (M); on entry, K contains the permutation vector. K is used as internal workspace, but reset to its original value on output. The way she works behind the scenes and then puts herself back together — iconic, periodt. 🎀

👑 Author 👑

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

Definition at line 103 of file dlapmr.f. Not me knowing exactly where the source lives 💀

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🎀 Author 🎀

Generated automatically by Doxygen for LAPACK from the source code. Automation ate, no crumbs. ✨

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xoxo, your LAPACK bestie 💖 — LAPACK Version 3.12.0, footer source: /home/abui...RC/dlapmr.f(3), and date: not shown on this page, so no cap, she didn’t leave one 🫶