# zlaset (3) - Linux Man Pages

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 (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