ZLAPMR(3)

💅 NAME 💅

okay so this is the manual page for zlapmr(3) — a "Library Functions Manual" entry, and the whole vibe is that it documents a file living at

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/zlapmr.f

bestie that path is long but we respect it 🫶

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✨ SYNOPSIS ✨

Functions/Subroutines

subroutine ZLAPMR (forwrd, m, n, x, ldx, k)

ZLAPMR rearranges rows of a matrix as specified by a permutation vector. that's literally the whole job, no cap 🎀

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🌸 Function/Subroutine Documentation 🌸

subroutine ZLAPMR (logical forwrd, integer m, integer n, complex*16,
    dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)

ZLAPMR rearranges rows of a matrix as specified by a permutation vector. yes she's that girl 💅

🦋 Purpose 🦋

!>
!> ZLAPMR 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.
!> If FORWRD = .TRUE.,  forward permutation:
!>
!>      X(K(I),*) is moved X(I,*) for I = 1,2,...,M.
!>
!> If FORWRD = .FALSE., backward permutation:
!>
!>      X(I,*) is moved to X(K(I),*) for I = 1,2,...,M.
!>

so like — you hand her a permutation K(1),K(2),...,K(M) of the integers 1,...,M and she shuffles the rows of your M by N matrix X around accordingly. one direction or the other, your call, main character energy ⭐

🎀 Parameters 🎀

• FORWRD — FORWRD is LOGICAL, and it picks the direction, iconic:

!>          FORWRD is LOGICAL
!>          = .TRUE., forward permutation
!>          = .FALSE., backward permutation
!>

• M — M is INTEGER, the number of rows of the matrix X. and M >= 0. (yes, zero rows is legal, we love an edge case 🙈)

!>          M is INTEGER
!>          The number of rows of the matrix X. M >= 0.
!>

• N — N is INTEGER, the number of columns of the matrix X. also N >= 0. ✨

!>          N is INTEGER
!>          The number of columns of the matrix X. N >= 0.
!>

• X — X is COMPLEX*16 array, dimension (LDX,N). on entry she's holding the M by N matrix X, and on exit X contains the permuted matrix X. glow-up complete 💖

!>          X is COMPLEX*16 array, dimension (LDX,N)
!>          On entry, the M by N matrix X.
!>          On exit, X contains the permuted matrix X.
!>

• LDX — LDX is INTEGER, the leading dimension of the array X, and she is not flexible about it: LDX >= MAX(1,M). 🫶

!>          LDX is INTEGER
!>          The leading dimension of the array X, LDX >= MAX(1,M).
!>

• K — K is INTEGER array, dimension (M). on entry, K contains the permutation vector. and here's the cute part: K is used as internal workspace, but it gets reset to its original value on output. she borrows your stuff and puts it back, we stan 😭👑

!>          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.
!>

🌈 Author 🌈

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

Definition at line 103 of file zlapmr.f. 🧚

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⭐ Author ⭐

Generated automatically by Doxygen for LAPACK from the source code. (not a human, just vibes and a parser 🍓)

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and that's the whole page, bestie — LAPACK, Version 3.12.0, dated the same as that very long /home/abui...RC/zlapmr.f(3) path up top. go forth and permute responsibly 💜✨