TESTING/LIN/drzt02.f(3)

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version 3.12.1 · 2 versions
, in arch rolling

💅 TESTING/LIN/drzt02.f 💅

okay so this is a page from the TESTING/LIN girlies — the manual is TESTING/LIN/drzt02.f(3) and honestly? she's a little testing icon and we're gonna get into it 🎀

✨ NAME ✨

TESTING/LIN/drzt02.f — like, that's her. that's the whole name. short and iconic, no notes 💅

🦋 SYNOPSIS 🦋

Functions/Subroutines

  • double precision function drzt02 (m, n, af, lda, tau, work, lwork) — this is DRZT02, bestie. double precision, does exactly what it says on the tin ✨

👑 Function/Subroutine Documentation 👑

double precision function drzt02 (integer m, integer n, double precision,
    dimension( lda, * ) af, integer lda, double precision, dimension( * )
    tau, double precision, dimension( lwork ) work, integer lwork)

DRZT02 🌸

🧚 Purpose 🧚

!> !> DRZT02 returns !> || I - Q'*Q || / ( M * eps) !> where the matrix Q is defined by the Householder transformations !> generated by DTZRZF. !>

so real talk: she hands you back || I - Q'*Q || / ( M * eps), and Q is that matrix built out of the Householder transformations that DTZRZF generated. that's the whole vibe 🫶

🌈 Parameters 🌈

  • M — M is INTEGER, and it's the number of rows of the matrix AF. rows girlie 💜
  • N — N is INTEGER, the number of columns of the matrix AF. columns bestie 💜
  • AF — AF is DOUBLE PRECISION array, dimension (LDA,N). it's the output of DTZRZF, so like, hand her what DTZRZF gave you, no cap ✨
  • LDA — LDA is INTEGER, the leading dimension of the array AF. the leading dimension, periodt 💅
  • TAU — TAU is DOUBLE PRECISION array, dimension (M). it holds the details of the Householder transformations as returned by DTZRZF — literally the receipts from DTZRZF 🎀
  • WORK — WORK is DOUBLE PRECISION array, dimension (LWORK). it's the workspace, she's just here to work 🧚
  • LWORK — LWORK is INTEGER, the length of the WORK array. heads up tho: LWORK >= N*N+N*NB. don't skimp on her, fr fr ⭐

💖 Author 💖

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

the whole academic + NAG Ltd. friend group co-signed this one 🫶

Definition at line 89 of file drzt02.f. 📍

🍓 Author 🍓

Generated automatically by Doxygen for LAPACK from the source code.

she was auto-generated by Doxygen for LAPACK straight from the source code — main character energy, honestly 😭

and that's the page! 💫 big slay to LAPACK, Version 3.12.0 — see you in the next one, bestie, mwah 💋🦋🌸

📦 where this page comes from