ZLARSCL2(3)

📦 version 3.12.0, in opensuse-leap 16.0

Welcome to the Library Functions Manual page for zlarscl2.f 💖 — yes, the LAPACK girlies are back and this one is a little diagonal-scaling icon.

🌸 NAME

/home/abui.../zlarscl2.f — that’s the file this page is serving, no cap. 🫶

✨ SYNOPSIS ✨

Functions/Subroutines

subroutine ZLARSCL2 (m, n, d, x, ldx)

ZLARSCL2 performs reciprocal diagonal scaling on a matrix. 💅

🦋 Function/Subroutine Documentation

subroutine ZLARSCL2 (integer m, integer n, double precision, dimension( * )
       d, complex*16, dimension( ldx, * ) x, integer ldx)

ZLARSCL2 performs reciprocal diagonal scaling on a matrix. periodt.

🎀 Purpose

Okay so the actual purpose, exact math and all, is:

!>
!> ZLARSCL2 performs a reciprocal diagonal scaling on a matrix:
!>   x <-- inv(D) * x
!> where the DOUBLE PRECISION diagonal matrix D is stored as a vector.
!>
!> Eventually to be replaced by BLAS_zge_diag_scale in the new BLAS
!> standard.
!>

🌈 Parameters

  • M — INTEGER; the number of rows of D and X. M >= 0.
  • N — INTEGER; the number of columns of X. N >= 0.
  • D — DOUBLE PRECISION array, length M; diagonal matrix D, stored as a vector of length M.
  • X — COMPLEX*16 array, dimension (LDX,N); on entry, the matrix X to be scaled by D; on exit, the scaled matrix.
  • LDX — INTEGER; the leading dimension of the matrix X. LDX >= M.

👑 Author

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

Definition at line 90 of file zlarscl2.f.

👑 Author (the Doxygen one)

Generated automatically by Doxygen for LAPACK from the source code.

💖 That’s the whole page, bestie! Footer tea: LAPACK, Version 3.12.0, source /home/abui.../zlarscl2.f(3). The original footer doesn’t list a date, so I’m not gonna invent one — no cap. 🫶✨

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