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lacpy(3) LAPACK lacpy(3)

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

Function Documentation

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.

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.

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.

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.

Author

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