/home/abui...N/dlarge.f(3)

💅 NAME 💅

okay so bestie, this is the manual page for /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/MATGEN/dlarge.f — yes the whole entire path, she's long, she's giving filesystem lore, and we're not shortening her 💖 (this one's from the Library Functions Manual, just so you know what vibe we're in).

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✨ SYNOPSIS ✨

Functions/Subroutines 🎀

• subroutine DLARGE (n, a, lda, iseed, work, info) — that's our girl DLARGE, the main character of this whole page 👑

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🌸 Function/Subroutine Documentation 🌸

subroutine DLARGE (integer n, double precision, dimension( lda, * ) a,
    integer lda, integer, dimension( 4 ) iseed, double precision, dimension(
    * ) work, integer info)

DLARGE ⭐

🦋 Purpose 🦋

!>
!> DLARGE pre- and post-multiplies a real general n by n matrix A
!> with a random orthogonal matrix: A = U*D*U'.
!>

no cap, that's the whole point of her — she takes your matrix and does the whole random-orthogonal glow-up on it 💫

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🔥 Parameters 🔥

okay so here's everyone in the cast, let's meet them 🫶

N

!>          N is INTEGER
!>          The order of the matrix A.  N >= 0.
!>

the order of the matrix A, and she has to be N >= 0 — no negative eras allowed 🙈

A

!>          A is DOUBLE PRECISION array, dimension (LDA,N)
!>          On entry, the original n by n matrix A.
!>          On exit, A is overwritten by U*A*U' for some random
!>          orthogonal matrix U.
!>

DOUBLE PRECISION array, dimension (LDA,N). On entry she's your original n by n matrix A — on exit she's been overwritten, bestie 😭 now she's U*A*U' for some random orthogonal matrix U. what she was before? gone. she's been transformed. periodt.

LDA

!>          LDA is INTEGER
!>          The leading dimension of the array A.  LDA >= N.
!>

INTEGER, the leading dimension of the array A, and it gotta be LDA >= N — respect the constraint or she will not be happy 💀

ISEED

!>          ISEED is INTEGER array, dimension (4)
!>          On entry, the seed of the random number generator; the array
!>          elements must be between 0 and 4095, and ISEED(4) must be
!>          odd.
!>          On exit, the seed is updated.
!>

INTEGER array, dimension (4) — the seed of the random number generator 🔮 On entry, the array elements must be between 0 and 4095, and ISEED(4) must be odd (say it with me: ISEED(4) must be odd 🗣️). On exit, the seed is updated — she evolves, she grows 🌱

WORK

!>          WORK is DOUBLE PRECISION array, dimension (2*N)
!>

DOUBLE PRECISION array, dimension (2*N) — just the workspace, she's there to help, lowkey underappreciated 💜

INFO

!>          INFO is INTEGER
!>          = 0: successful exit
!>          < 0: if INFO = -i, the i-th argument had an illegal value
!>

INTEGER, the vibe report:

• = 0 — successful exit, we ate, everyone claps 👏
• < 0 — if INFO = -i, then the i-th argument had an illegal value, so something was NOT it 😭

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👑 Author 👑

these iconic institutions fr fr:

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

Definition at line 86 of file dlarge.f. 📍

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🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code — she's a bot-written queen and she's thriving 🤖✨

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💌 cute little sign-off: this whole thing is LAPACK, Version 3.12.0, and yeah the footer path is /home/abui...N/dlarge.f(3) — snip snip, truncated and adorable ✂️🫶 take care bestie, go multiply something 💖