SRC/zlarscl2.f(3)

🎀 SRC/zlarscl2.f(3) 🎀

okay bestie, this is the Library Functions Manual page for SRC/zlarscl2.f, and it's giving “small but iconic routine” energy 💅✨. Let's unpack it together.

🌸 NAME 🌸

The name is literally SRC/zlarscl2.f — that's it, that's the whole name, no cap 🫶.

💖 SYNOPSIS 💖

🧚 Functions/Subroutines 🧚

   subroutine zlarscl2 (m, n, d, x, ldx)
       ZLARSCL2 performs reciprocal diagonal scaling on a matrix.

Bestie, that's the vibe check: ZLARSCL2 performs reciprocal diagonal scaling on a matrix. 🔥

✨ Function/Subroutine Documentation ✨

Here's the full signature, character-for-character, because we do not play with declarations 🙈:

   subroutine zlarscl2 (integer m, integer n, double precision, dimension( * )
       d, complex*16, dimension( ldx, * ) x, integer ldx)

And yes: ZLARSCL2 performs reciprocal diagonal scaling on a matrix. 💖

💜 Purpose 💜

okay so the whole point is 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 🌟

M is INTEGER

The number of rows of D and X. M >= 0. 🫶

🌟 N 🌟

N is INTEGER

The number of columns of X. N >= 0. 🫶

🌟 D 🌟

D is DOUBLE PRECISION array, length M

Diagonal matrix D, stored as a vector of length M. 💅

🌟 X 🌟

X is COMPLEX*16 array, dimension (LDX,N)

On entry, the matrix X to be scaled by D.

On exit, the scaled matrix. 🌈

🌟 LDX 🌟

LDX is INTEGER

The leading dimension of the matrix X. LDX >= M. 👑

🫶 Author 🫶

Shoutout to the authors, fr fr:

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

📍 Definition at line 90 of file zlarscl2.f.

🤖 Author 🤖

This page was Generated automatically by Doxygen for LAPACK from the source code. 🧚

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xoxo, stay slay 💖 This was LAPACK Version 3.12.0 · SRC/zlarscl2.f(3) 🎀