ZGEQLS(3)

💖 NAME 💖

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/zgeqls.f

Okay bestie, so this is a Library Functions Manual page, and the header path is /home/abui...IN/zgeqls.f(3). The file above is the ZGEQLS source file. Lowkey iconic. 💅

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✨ SYNOPSIS ✨

🌸 Functions/Subroutines 🌸

• subroutine ZGEQLS (m, n, nrhs, a, lda, tau, b, ldb, work, lwork, info) — ZGEQLS

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🦋 Function/Subroutine Documentation 🦋

🎀 subroutine ZGEQLS 🎀

subroutine ZGEQLS (integer m, integer n, integer nrhs, complex*16,
     dimension( lda, * ) a, integer lda, complex*16, dimension( * ) tau,
     complex*16, dimension( ldb, * ) b, integer ldb, complex*16, dimension(
     lwork ) work, integer lwork, integer info)

ZGEQLS — that’s the routine, no cap. ✨

💫 Purpose 💫

!>
!> Solve the least squares problem
!>     min || A*X - B ||
!> using the QL factorization
!>     A = Q*L
!> computed by ZGEQLF.
!>

Like, it solves the least squares problem using the QL factorization A = Q*L computed by ZGEQLF. Slay. 🔥

🌈 Parameters 🌈

• M — M is INTEGER. It’s the number of rows of the matrix A. M >= 0.
• N — N is INTEGER. It’s the number of columns of the matrix A. M >= N >= 0.
• NRHS — NRHS is INTEGER. It’s the number of columns of B. NRHS >= 0.
• A — A is COMPLEX*16 array, dimension (LDA,N). It holds details of the QL factorization of the original matrix A as returned by ZGEQLF.
• LDA — LDA is INTEGER. It’s the leading dimension of the array A. LDA >= M.
• TAU — TAU is COMPLEX*16 array, dimension (N). It holds details of the orthogonal matrix Q.
• B — B is COMPLEX*16 array, dimension (LDB,NRHS). On entry, it’s the m-by-nrhs right hand side matrix B. On exit, it’s the n-by-nrhs solution matrix X, stored in rows m-n+1:m.
• LDB — LDB is INTEGER. It’s the leading dimension of the array B. LDB >= M.
• WORK — WORK is COMPLEX*16 array, dimension (LWORK).
• LWORK — LWORK is INTEGER. It’s the length of the array WORK. LWORK must be at least NRHS, and should be at least NRHS*NB, where NB is the block size for this environment.
• INFO — INFO is INTEGER. = 0: successful exit. < 0: if INFO = -i, the i-th argument had an illegal value.

Like, respect the dimensions, bestie. LWORK has a whole minimum and a should-be-at-least situation. Don’t play with it. 😭

👑 Author 👑

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

📌 Definition at line 120 of file zgeqls.f.

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🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code.

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That’s the whole page, bestie. Source/version: LAPACK Version 3.12.0, and the footer path is /home/abui...IN/zgeqls.f(3). Periodt. 💅🫶