# zlaset.f man page

zlaset.f —

## Synopsis

### Functions/Subroutines

subroutinezlaset(UPLO, M, N, ALPHA, BETA, A, LDA)ZLASETinitializes the off-diagonal elements and the diagonal elements of a matrix to given values.

## Function/Subroutine Documentation

### subroutine zlaset (characterUPLO, integerM, integerN, complex*16ALPHA, complex*16BETA, complex*16, dimension( lda, * )A, integerLDA)

**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:**

September 2012

Definition at line 107 of file zlaset.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

zlaset(3) is an alias of zlaset.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK