LAPACK  3.4.2
LAPACK: Linear Algebra PACKage
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zlaset.f File Reference

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Functions/Subroutines

subroutine zlaset (UPLO, M, N, ALPHA, BETA, A, LDA)
 ZLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.

Function/Subroutine Documentation

subroutine zlaset ( character  UPLO,
integer  M,
integer  N,
complex*16  ALPHA,
complex*16  BETA,
complex*16, dimension( lda, * )  A,
integer  LDA 
)

ZLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.

Download ZLASET + dependencies [TGZ] [ZIP] [TXT]
Purpose: 
 ZLASET initializes a 2-D array A to BETA on the diagonal and
 ALPHA on the offdiagonals.
Parameters:
[in]UPLO
          UPLO is CHARACTER*1
          Specifies the part of the matrix A to be set.
          = 'U':      Upper triangular part is set. The lower triangle
                      is unchanged.
          = 'L':      Lower triangular part is set. The upper triangle
                      is unchanged.
          Otherwise:  All of the matrix A is set.
[in]M
          M is INTEGER
          On entry, M specifies the number of rows of A.
[in]N
          N is INTEGER
          On entry, N specifies the number of columns of A.
[in]ALPHA
          ALPHA is COMPLEX*16
          All the offdiagonal array elements are set to ALPHA.
[in]BETA
          BETA is COMPLEX*16
          All the diagonal array elements are set to BETA.
[in,out]A
          A is COMPLEX*16 array, dimension (LDA,N)
          On entry, the m by n matrix A.
          On exit, A(i,j) = ALPHA, 1 <= i <= m, 1 <= j <= n, i.ne.j;
                   A(i,i) = BETA , 1 <= i <= min(m,n)
[in]LDA
          LDA is INTEGER
          The leading dimension of the array A.  LDA >= max(1,M).
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012

Definition at line 107 of file zlaset.f.

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