TESTING/LIN/zlaipd.f(3)

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version 3.12.1 · 2 versions
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🧚 TESTING/LIN/zlaipd.f(3) 🧚

hey bestie, welcome to this page from the Library Functions Manual — it's all about the zlaipd subroutine, aka ZLAIPD, and yes it's giving "tiny utility with a very specific job" energy 💅

🌈 NAME 🌈

TESTING/LIN/zlaipd.f — home of the zlaipd subroutine, also known as ZLAIPD ✨

🦋 SYNOPSIS 🦋

Functions/Subroutines

  • subroutine zlaipd (n, a, inda, vinda) — ZLAIPD

🌸 Function/Subroutine Documentation 🌸

subroutine zlaipd

subroutine zlaipd (integer n, complex*16, dimension( * ) a, integer inda,
    integer vinda)

ZLAIPD

💖 Purpose 💖

okay so ZLAIPD sets the imaginary part of the diagonal elements of a complex matrix A to a large value. no cap, that's the whole mission 🫶

this is used to test LAPACK routines for complex Hermitian matrices — the ones that are not supposed to access or use the imaginary parts of the diagonals. so yeah, it's a little trap/test setup situation 👑

✨ Parameters ✨

  • N — N is INTEGER. it's the number of diagonal elements of A.
  • A — A is COMPLEX*16 array, dimension:
(1+(N-1)*INDA+(N-2)*VINDA)

on entry, this is the complex (Hermitian) matrix A. on exit, the imaginary parts of the diagonal elements are set to BIGNUM = EPS / SAFMIN, where EPS is the machine epsilon and SAFMIN is the safe minimum. slay 💅

  • INDA — INDA is INTEGER. it's the increment between A(1) and the next diagonal element of A.

typical values are:

  • = LDA+1: square matrices with leading dimension LDA
  • = 2: packed upper triangular matrix, starting at A(1,1)
  • = N: packed lower triangular matrix, starting at A(1,1)
  • VINDA — VINDA is INTEGER. it's the change in the diagonal increment between columns of A.

typical values are:

  • = 0: no change, the row and column increments in A are fixed
  • = 1: packed upper triangular matrix
  • = -1: packed lower triangular matrix

👑 Author 👑

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

Definition at line 82 of file zlaipd.f.

💜 Author 💜

Generated automatically by Doxygen for LAPACK from the source code.

okay that's the whole page bestie — the cute little sign-off says this is LAPACK, Version 3.12.0, filed as TESTING/LIN/zlaipd.f(3) 💖✨🎀

📦 where this page comes from