TESTING/LIN/zlattr.f(3)

✨ NAME ✨

TESTING/LIN/zlattr.f

okay bestie, this is the Library Functions Manual page for TESTING/LIN/zlattr.f(3), and it's literally all about ZLATTR — the triangular test-matrix generator. 💅

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✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

subroutine zlattr (imat, uplo, trans, diag, iseed, n, a, lda, b, work,
    rwork, info)
    ZLATTR

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💅 Function/Subroutine Documentation 💅

Here's the full signature, character for character:

subroutine zlattr (integer imat, character uplo, character trans, character
    diag, integer, dimension( 4 ) iseed, integer n, complex*16, dimension(
    lda, * ) a, integer lda, complex*16, dimension( * ) b, complex*16,
    dimension( * ) work, double precision, dimension( * ) rwork, integer
    info)

ZLATTR

🎀 Purpose

ZLATTR generates a triangular test matrix in 2-dimensional storage. IMAT and UPLO uniquely specify the properties of the test matrix, which is returned in the array A.

🍓 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
• 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 ZLATMS). Modified on exit.
• N — N is INTEGER; the order of the matrix to be generated.
• A — A is COMPLEX*16 array, dimension (LDA,N); the triangular matrix A. If UPLO = 'U', the leading N x N upper triangular part of the array A contains the upper triangular matrix, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading N x N lower triangular part of the array A contains the lower triangular matrix and the strictly upper triangular part of A is not referenced.
• LDA — LDA is INTEGER; the leading dimension of the array A. LDA >= max(1,N).
• B — B is COMPLEX*16 array, dimension (N); the right hand side vector, if IMAT > 10.
• WORK — WORK is COMPLEX*16 array, dimension (2*N).
• RWORK — RWORK is DOUBLE PRECISION array, dimension (N).
• INFO — INFO is INTEGER
  • = 0: successful exit
  • < 0: if INFO = -i, the i-th argument had an illegal value

👑 Author

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

Definition at line 136 of file zlattr.f.

🌈 Author

This one's the auto-generated bit: Generated automatically by Doxygen for LAPACK from the source code.

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mwah 💋 that's the wrap: LAPACK Version 3.12.0, TESTING/LIN/zlattr.f(3), generated automatically by Doxygen for LAPACK from the source code. 🫶