# zlaset.f - Man Page

## 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

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page zlaset(3) is an alias of zlaset.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK