TESTING/EIG/dget36.f(3)

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💅 TESTING/EIG/dget36.f — Library Functions Manual 💅

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🌸 NAME 🌸

TESTING/EIG/dget36.f — the manual page for the dget36 test routine, fr fr.

✨ SYNOPSIS ✨

Functions/Subroutines

subroutine dget36 (rmax, lmax, ninfo, knt, nin)
    DGET36

🦋 Function/Subroutine Documentation 🦋

subroutine dget36 (double precision rmax, integer lmax, integer, dimension(
    3 ) ninfo, integer knt, integer nin)

DGET36 — that’s the name on the label, icon.

🎀 Purpose 🎀

Bestie, here’s the whole vibe of what this test is doing:

DGET36 tests DTREXC, a routine for moving blocks (either 1 by 1 or 2 by 2) on the diagonal of a matrix in real Schur form. Thus, DLAEXC computes an orthogonal matrix Q such that

   Q' * T1 * Q  = T2

and where one of the diagonal blocks of T1 (the one at row IFST) has been moved to position ILST.

The test code verifies that the residual Q'*T1*Q-T2 is small, that T2 is in Schur form, and that the final position of the IFST block is ILST (within +-1).

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

🌈 Parameters 🌈

  • RMAX — RMAX is DOUBLE PRECISION; value of the largest test ratio. Literally the biggest ratio, bestie. 🔥
  • LMAX — LMAX is INTEGER; example number where largest test ratio achieved. So we know which example ate. 👑
  • NINFO — NINFO is INTEGER array, dimension (3); NINFO(J) is the number of examples where INFO=J. Counting the info outcomes, periodt. 🧮
  • KNT — KNT is INTEGER; total number of examples tested. The full headcount of examples. 🎀
  • NIN — NIN is INTEGER; input logical unit number. That’s the file unit for reading the test matrices. 🗂️

👑 Author 👑

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

Definition at line 87 of file dget36.f.

🤖 Author 🤖

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