---
name: "claset"
section: "3lapack"
platform: "linux"
package: "liblapack-doc"
version: "3.2.1-8"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/claset/3lapack"
---

# claset(3lapack)

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

## NAME

CLASET - initializes a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals

## SYNOPSIS

- SUBROUTINE CLASET(

  UPLO, M, N, ALPHA, BETA, A, LDA )

- CHARACTER

  UPLO

- INTEGER

  LDA, M, N

- COMPLEX

  ALPHA, BETA

- COMPLEX

  A( LDA, \* )

## PURPOSE

CLASET initializes a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals.

## ARGUMENTS

- UPLO (input) 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 (input) INTEGER

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

- N (input) INTEGER

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

- ALPHA (input) COMPLEX

  All the offdiagonal array elements are set to ALPHA.

- BETA (input) COMPLEX

  All the diagonal array elements are set to BETA.

- A (input/output) COMPLEX 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 (input) INTEGER

  The leading dimension of the array A.  LDA \>= max(1,M).