DLATB4(3)

💅 DLATB4(3) — Library Functions Manual energy 💅

okay so bestie, this is DLATB4(3) from the Library Functions Manual, and the header path is /home/abui...IN/dlatb4.f(3). We are literally about to get into this Fortran subroutine’s whole vibe. ✨

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✨ NAME ✨

The name line is this source-file path, no cap:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/dlatb4.f

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🦋 SYNOPSIS 🦋

✨ Functions/Subroutines ✨

subroutine DLATB4 (path, imat, m, n, type, kl, ku, anorm, mode, cndnum,
    dist)
    DLATB4

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🎀 Function/Subroutine Documentation 🎀

Here’s the full signature, copied exactly so nobody has to guess:

subroutine DLATB4 (character*3 path, integer imat, integer m, integer n,
    character type, integer kl, integer ku, double precision anorm, integer
    mode, double precision cndnum, character dist)
    DLATB4

💖 Purpose 💖

DLATB4 sets parameters for the matrix generator based on the type of matrix to be generated. That’s the whole assignment, and it ate. 💅

🍓 Parameters 🍓

• PATH — PATH is CHARACTER*3, and it is the LAPACK path name.
• IMAT — IMAT is INTEGER, and it is an integer key describing which matrix to generate for this path.
• M — M is INTEGER, and it is the number of rows in the matrix to be generated.
• N — N is INTEGER, and it is the number of columns in the matrix to be generated.
• TYPE — TYPE is CHARACTER*1, and it is the type of the matrix to be generated:
  • = 'S': symmetric matrix
  • = 'P': symmetric positive (semi)definite matrix
  • = 'N': nonsymmetric matrix
• KL — KL is INTEGER, and it is the lower band width of the matrix to be generated.
• KU — KU is INTEGER, and it is the upper band width of the matrix to be generated.
• ANORM — ANORM is DOUBLE PRECISION, and it is the desired norm of the matrix to be generated. The diagonal matrix of singular values or eigenvalues is scaled by this value.
• MODE — MODE is INTEGER, and it is a key indicating how to choose the vector of eigenvalues.
• CNDNUM — CNDNUM is DOUBLE PRECISION, and it is the desired condition number.
• DIST — DIST is CHARACTER*1, and it is the type of distribution to be used by the random number generator.

🌈 Author 🌈

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

👑 Definition 👑

Definition at line 118 of file dlatb4.f.

😭 Author (page-generation edition) 😭

Generated automatically by Doxygen for LAPACK from the source code.

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k bye bestie 🫶 this footer says source LAPACK, version Version 3.12.0, and path /home/abui...IN/dlatb4.f(3). No date shown on this footer — just that iconic source/version/path combo. Slay. 💅