TESTING/EIG/cget38.f(3)

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version 3.12.1 · 3 versions
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🎀 TESTING/EIG/cget38.f 🎀

okay so bestie, welcome to this page from the Library Functions Manual. it’s giving “subroutine testing but make it cute,” and honestly? we’re obsessed. this whole page is about CGET38, and the vibe is very “main character does linear algebra” 💅✨

🌸 NAME 🌸

TESTING/EIG/cget38.f

✨ SYNOPSIS ✨

💫 Functions/Subroutines 💫

subroutine cget38 (rmax, lmax, ninfo, knt, nin)
    CGET38

💖 Function/Subroutine Documentation 💖

subroutine cget38 (real, dimension( 3 ) rmax, integer, dimension( 3 ) lmax,
    integer, dimension( 3 ) ninfo, integer knt, integer nin)
    CGET38

🦋 Purpose 🦋

CGET38 tests CTRSEN, a routine for estimating condition numbers of a cluster of eigenvalues and/or its associated right invariant subspace. periodt.

The test matrices are read from a file with logical unit number NIN. yup, that’s the input file energy 🫶

🍓 Parameters 🍓

💜 RMAX

  • RMAX — RMAX is REAL array, dimension (3)
    • values of the largest test ratios, bestie:
    • RMAX(1) = largest residuals from CHST01 or comparing different calls to CTRSEN
    • RMAX(2) = largest error in reciprocal condition numbers taking their conditioning into account
    • RMAX(3) = largest error in reciprocal condition numbers not taking their conditioning into account (may be larger than RMAX(2))

🌈 LMAX

  • LMAX — LMAX is INTEGER array, dimension (3)
    • LMAX(i) is example number where largest test ratio RMAX(i) is achieved. Also:
      • If CGEHRD returns INFO nonzero on example i, LMAX(1)=i
      • If CHSEQR returns INFO nonzero on example i, LMAX(2)=i
      • If CTRSEN returns INFO nonzero on example i, LMAX(3)=i

🔥 NINFO

  • NINFO — NINFO is INTEGER array, dimension (3)
    • NINFO(1) = No. of times CGEHRD returned INFO nonzero
    • NINFO(2) = No. of times CHSEQR returned INFO nonzero
    • NINFO(3) = No. of times CTRSEN returned INFO nonzero

⭐ KNT

  • KNT — KNT is INTEGER
    • total number of examples tested. slay, we’re counting 📊

🧚 NIN

  • NIN — NIN is INTEGER
    • input logical unit number. that’s the file-reading hookup 🔌

👑 Author 👑

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

Definition at line 90 of file cget38.f.

🫶 Author 🫶

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byeee 💖 this iconic little page is from LAPACK Version 3.12.0, and the page itself is TESTING/EIG/cget38.f(3). no cap, that’s the source/version sign-off, bestie 🎀✨

📦 where this page comes from