lacpy(3)

📦
version 3.12.1 · 9 versions
, in arch rolling

💅 lacpy(3) — copy matrix, bestie 💅

okay so welcome to the lacpy(3) page from the Library Functions Manual. This is the LAPACK corner where four subroutines — clacpy, dlacpy, slacpy, and zlacpy — all do the copy-matrix thing in different precisions/types. It's giving "same fit, different colorway," and honestly? iconic. ✨

🎀 NAME 🎀

lacpy — lacpy: copy matrix 💖

🦋 SYNOPSIS 🦋

🌸 Functions 🌸

  • subroutine clacpy (uplo, m, n, a, lda, b, ldb) — CLACPY copies all or part of one two-dimensional array to another.
  • subroutine dlacpy (uplo, m, n, a, lda, b, ldb) — DLACPY copies all or part of one two-dimensional array to another.
  • subroutine slacpy (uplo, m, n, a, lda, b, ldb) — SLACPY copies all or part of one two-dimensional array to another.
  • subroutine zlacpy (uplo, m, n, a, lda, b, ldb) — ZLACPY copies all or part of one two-dimensional array to another.

💫 Detailed Description 💫

The original page has this heading but doesn't put any extra tea under it, so bestie, we're not inventing any. The actual details are in Function Documentation right below. 👇

🔥 Function Documentation 🔥

💖 clacpy — complex copy energy 💖

subroutine clacpy (character uplo, integer m, integer n, complex, dimension(
       lda, * ) a, integer lda, complex, dimension( ldb, * ) b, integer ldb)

CLACPY copies all or part of one two-dimensional array to another. 🫶

🎯 Purpose

CLACPY copies all or part of a two-dimensional matrix A to another matrix B.

🌈 Parameters 🌈

  • UPLO — UPLO is CHARACTER*1. Specifies the part of the matrix A to be copied to B.
    • = 'U': Upper triangular part
    • = 'L': Lower triangular part
    • Otherwise: All of the matrix A
  • M — M is INTEGER. The number of rows of the matrix A. M >= 0.
  • N — N is INTEGER. The number of columns of the matrix A. N >= 0.
  • A — A is COMPLEX array, dimension (LDA,N). The m by n matrix A. If UPLO = 'U', only the upper trapezium is accessed; if UPLO = 'L', only the lower trapezium is accessed.
  • LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,M).
  • B — B is COMPLEX array, dimension (LDB,N). On exit, B = A in the locations specified by UPLO.
  • LDB — LDB is INTEGER. The leading dimension of the array B. LDB >= max(1,M).

👑 Author 👑

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

Definition at line 102 of file clacpy.f. 📌

🦋 dlacpy — double-precision copy moment 🦋

subroutine dlacpy (character uplo, integer m, integer n, double precision,
       dimension( lda, * ) a, integer lda, double precision, dimension( ldb, *
       ) b, integer ldb)

DLACPY copies all or part of one two-dimensional array to another. 💜

🎯 Purpose

DLACPY copies all or part of a two-dimensional matrix A to another matrix B.

🌈 Parameters 🌈

  • UPLO — UPLO is CHARACTER*1. Specifies the part of the matrix A to be copied to B.
    • = 'U': Upper triangular part
    • = 'L': Lower triangular part
    • Otherwise: All of the matrix A
  • M — M is INTEGER. The number of rows of the matrix A. M >= 0.
  • N — N is INTEGER. The number of columns of the matrix A. N >= 0.
  • A — A is DOUBLE PRECISION array, dimension (LDA,N). The m by n matrix A. If UPLO = 'U', only the upper triangle or trapezoid is accessed; if UPLO = 'L', only the lower triangle or trapezoid is accessed.
  • LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,M).
  • B — B is DOUBLE PRECISION array, dimension (LDB,N). On exit, B = A in the locations specified by UPLO.
  • LDB — LDB is INTEGER. The leading dimension of the array B. LDB >= max(1,M).

👑 Author 👑

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

Definition at line 102 of file dlacpy.f. 📌

🌸 slacpy — real-copy slay 🌸

subroutine slacpy (character uplo, integer m, integer n, real, dimension(
       lda, * ) a, integer lda, real, dimension( ldb, * ) b, integer ldb)

SLACPY copies all or part of one two-dimensional array to another. 🎀

🎯 Purpose

SLACPY copies all or part of a two-dimensional matrix A to another matrix B.

🌈 Parameters 🌈

  • UPLO — UPLO is CHARACTER*1. Specifies the part of the matrix A to be copied to B.
    • = 'U': Upper triangular part
    • = 'L': Lower triangular part
    • Otherwise: All of the matrix A
  • M — M is INTEGER. The number of rows of the matrix A. M >= 0.
  • N — N is INTEGER. The number of columns of the matrix A. N >= 0.
  • A — A is REAL array, dimension (LDA,N). The m by n matrix A. If UPLO = 'U', only the upper triangle or trapezoid is accessed; if UPLO = 'L', only the lower triangle or trapezoid is accessed.
  • LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,M).
  • B — B is REAL array, dimension (LDB,N). On exit, B = A in the locations specified by UPLO.
  • LDB — LDB is INTEGER. The leading dimension of the array B. LDB >= max(1,M).

👑 Author 👑

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

Definition at line 102 of file slacpy.f. 📌

⭐ zlacpy — complex*16 copy royalty ⭐

subroutine zlacpy (character uplo, integer m, integer n, complex*16,
       dimension( lda, * ) a, integer lda, complex*16, dimension( ldb, * ) b,
       integer ldb)

ZLACPY copies all or part of one two-dimensional array to another. 👑

🎯 Purpose

ZLACPY copies all or part of a two-dimensional matrix A to another matrix B.

🌈 Parameters 🌈

  • UPLO — UPLO is CHARACTER*1. Specifies the part of the matrix A to be copied to B.
    • = 'U': Upper triangular part
    • = 'L': Lower triangular part
    • Otherwise: All of the matrix A
  • M — M is INTEGER. The number of rows of the matrix A. M >= 0.
  • N — N is INTEGER. The number of columns of the matrix A. N >= 0.
  • A — A is COMPLEX*16 array, dimension (LDA,N). The m by n matrix A. If UPLO = 'U', only the upper trapezium is accessed; if UPLO = 'L', only the lower trapezium is accessed.
  • LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,M).
  • B — B is COMPLEX*16 array, dimension (LDB,N). On exit, B = A in the locations specified by UPLO.
  • LDB — LDB is INTEGER. The leading dimension of the array B. LDB >= max(1,M).

👑 Author 👑

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

Definition at line 102 of file zlacpy.f. 📌

🌟 Author 🌟

Generated automatically by Doxygen for LAPACK from the source code. 🤖

And that's the page, bestie! Source/version: LAPACK Version 3.12.0. Manual: lacpy(3). Date: the footer doesn't print one here, so I'm not making one up. 🫶💖

📦 where this page comes from