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  4. zlaset(3)

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zlaset.f(3) LAPACK zlaset.f(3)

NAME

zlaset.f

SYNOPSIS

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.

Purpose: 



 ZLASET initializes a 2-D array A to BETA on the diagonal and


 ALPHA on the offdiagonals.

Parameters:

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.

M



          M is INTEGER


          On entry, M specifies the number of rows of A.

N



          N is INTEGER


          On entry, N specifies the number of columns of A.

ALPHA



          ALPHA is COMPLEX*16


          All the offdiagonal array elements are set to ALPHA.

BETA



          BETA is COMPLEX*16


          All the diagonal array elements are set to BETA.

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)

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:

December 2016

Definition at line 108 of file zlaset.f.

Author

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