DLATTP(3)

🎀 NAME 🎀

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/dlattp.f — literally the file this page is about, bestie. And yes, we are on the dlattp.f(3) page in the Library Functions Manual neighborhood ✨

🦋 SYNOPSIS 🦋

💅 Functions/Subroutines 💅

• subroutine DLATTP (imat, uplo, trans, diag, iseed, n, a, b, work, info)
  • DLATTP

🌸 Function/Subroutine Documentation 🌸

✨ Purpose ✨

okay so DLATTP generates a triangular test matrix in packed storage. IMAT and UPLO uniquely specify the properties of the test matrix, which is returned in the array AP. periodt 💖

🔥 Parameters 🔥

• IMAT — IMAT is INTEGER. An integer key describing which matrix to generate for this path.
• UPLO — UPLO is CHARACTER*1. Specifies whether the matrix A will be upper or lower triangular.
  • = 'U': Upper triangular
  • = 'L': Lower triangular
• TRANS — TRANS is CHARACTER*1. Specifies whether the matrix or its transpose will be used.
  • = 'N': No transpose
  • = 'T': Transpose
  • = 'C': Conjugate transpose (= Transpose)
• DIAG — DIAG is CHARACTER*1. Specifies whether or not the matrix A is unit triangular.
  • = 'N': Non-unit triangular
  • = 'U': Unit triangular
• ISEED — ISEED is INTEGER array, dimension (4). The seed vector for the random number generator (used in DLATMS). Modified on exit.
• N — N is INTEGER. The order of the matrix to be generated.
• A — A is DOUBLE PRECISION array, dimension (N*(N+1)/2). The upper or lower triangular matrix A, packed columnwise in a linear array. The j-th column of A is stored in the array AP as follows:

if UPLO = 'U', AP((j-1)*j/2 + i) = A(i,j) for 1<=i<=j;
if UPLO = 'L',
   AP((j-1)*(n-j) + j*(j+1)/2 + i-j) = A(i,j) for j<=i<=n.

• B — B is DOUBLE PRECISION array, dimension (N). The right hand side vector, if IMAT > 10.
• WORK — WORK is DOUBLE PRECISION array, dimension (3*N).
• INFO — INFO is INTEGER.
  • = 0: successful exit
  • < 0: if INFO = -k, the k-th argument had an illegal value

🖋️ Author 🖋️

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

📍 Definition 📍

Definition at line 123 of file dlattp.f.

🤖 Author 🤖

Generated automatically by Doxygen for LAPACK from the source code.

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sign-off from the footer, bestie: this is LAPACK Version 3.12.0, and the page path is /home/abui...IN/dlattp.f(3). The footer doesn't hand us a date, so I'm not inventing one 🙈💜