SLASET(3)

Bestie, okay so this is SLASET(3) from the Library Functions Manual — header path is /home/abui...RC/slaset.f(3), and the LAPACK energy is lowkey immaculate. 💅✨ It’s giving “set a matrix’s diagonal and off-diagonal entries to constants,” and honestly? This subroutine ate and left no crumbs.

🎀 NAME 🎀

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

✨ SYNOPSIS ✨

🌈 Functions/Subroutines 🌈

subroutine SLASET (uplo, m, n, alpha, beta, a, lda)

• SLASET — initializes the off-diagonal elements and the diagonal elements of a matrix to given values. No cap. 🫶

👑 Function/Subroutine Documentation 👑

Full signature, exactly as the page has it:

subroutine SLASET (character uplo, integer m, integer n, real alpha, real beta, real, dimension( lda, * ) a, integer lda)

SLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values. 💖

🦋 Purpose 🦋

SLASET initializes an m-by-n matrix A to BETA on the diagonal and ALPHA on the offdiagonals. That’s the whole vibe check, fr fr. ✨

🌸 Parameters 🌸

• UPLO — CHARACTER*1. Specifies the part of the matrix A to be set. 'U': Upper triangular part is set; the strictly lower triangular part of A is not changed. 'L': Lower triangular part is set; the strictly upper triangular part of A is not changed. Otherwise: All of the matrix A is set. 🫶
• M — INTEGER. The number of rows of the matrix A. M >= 0.
• N — INTEGER. The number of columns of the matrix A. N >= 0.
• ALPHA — REAL. The constant to which the offdiagonal elements are to be set.
• BETA — REAL. The constant to which the diagonal elements are to be set.
• A — REAL array, dimension (LDA,N). On exit, the leading m-by-n submatrix of A is set as follows:

if UPLO = 'U', A(i,j) = ALPHA, 1<=i<=j-1, 1<=j<=n,
if UPLO = 'L', A(i,j) = ALPHA, j+1<=i<=m, 1<=j<=n,
otherwise,     A(i,j) = ALPHA, 1<=i<=m, 1<=j<=n, i.ne.j,

and, for all UPLO, A(i,i) = BETA, 1<=i<=min(m,n).

Not me reading those exact assignment conditions like a main character. 📋💅

• LDA — INTEGER. The leading dimension of the array A. LDA >= max(1,M). iykyk.

💜 Author 💜

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

Definition at line 109 of file slaset.f.

😭 Author 😭

Generated automatically by Doxygen for LAPACK from the source code.

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Later, bestie! 🫶 This page signs off from LAPACK Version 3.12.0, page /home/abui...RC/slaset.f(3). Periodt. 💖