TESTING/EIG/cget37.f(3)

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version 3.12.1 · 2 versions
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✨ NAME ✨

okay so bestie, this page is literally for TESTING/EIG/cget37.f 💅 and the manual name is Library Functions Manual — not me folding that in near the top instead of copy-pasting the header line, periodt. 🎀

🌸 SYNOPSIS 🌸

🧚 Functions/Subroutines 🧚

       subroutine cget37 (rmax, lmax, ninfo, knt, nin)
           CGET37

💅 Function/Subroutine Documentation 💅

   subroutine cget37 (real, dimension( 3 ) rmax, integer, dimension( 3 ) lmax,
       integer, dimension( 3 ) ninfo, integer knt, integer nin)
       CGET37

🎀 Purpose 🎀

CGET37 tests CTRSNA, a routine for estimating condition numbers of eigenvalues and/or right eigenvectors of a matrix. 🦋 No cap, that's the whole purpose.

The test matrices are read from a file with logical unit number NIN. ✨

🍓 Parameters 🍓

  • RMAX — bestie, this one is a REAL array, dimension (3). It's the value of the largest test ratio, and here's the breakdown:
    • RMAX(1) = largest ratio comparing different calls to CTRSNA
    • 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 — this is an 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 CTRSNA returns INFO nonzero on example i, LMAX(3)=i
  • NINFO — another 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 CTRSNA returned INFO nonzero
  • KNT — this one is INTEGER. Total number of examples tested. 💯
  • NIN — and this is INTEGER. Input logical unit number. 🔥

👑 Author 👑

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

Definition at line 89 of file cget37.f.

👑 Author 👑

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okay bestie, that's the whole page 🫶 the footer vibe is LAPACK Version 3.12.0, and the page tag is TESTING/EIG/cget37.f(3) — slay, bye! 💖

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