# lascl2 - Man Page

lascl2: diagonal scale matrix, A = D A

## Synopsis

### Functions

subroutine **clascl2** (m, n, d, x, ldx)**CLASCL2** performs diagonal scaling on a matrix.

subroutine **dlascl2** (m, n, d, x, ldx)**DLASCL2** performs diagonal scaling on a matrix.

subroutine **slascl2** (m, n, d, x, ldx)**SLASCL2** performs diagonal scaling on a matrix.

subroutine **zlascl2** (m, n, d, x, ldx)**ZLASCL2** performs diagonal scaling on a matrix.

## Detailed Description

## Function Documentation

### subroutine clascl2 (integer m, integer n, real, dimension( * ) d, complex, dimension( ldx, * ) x, integer ldx)

**CLASCL2** performs diagonal scaling on a matrix.

**Purpose:**

CLASCL2 performs a diagonal scaling on a matrix: x <-- D * x where the diagonal REAL matrix D is stored as a matrix. Eventually to be replaced by BLAS_cge_diag_scale in the new BLAS standard.

**Parameters***M*M is INTEGER The number of rows of D and X. M >= 0.

*N*N is INTEGER The number of columns of X. N >= 0.

*D*D is REAL array, length M Diagonal matrix D, stored as a vector of length M.

*X*X is COMPLEX array, dimension (LDX,N) On entry, the matrix X to be scaled by D. On exit, the scaled matrix.

*LDX*LDX is INTEGER The leading dimension of the matrix X. LDX >= M.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **90** of file **clascl2.f**.

### subroutine dlascl2 (integer m, integer n, double precision, dimension( * ) d, double precision, dimension( ldx, * ) x, integer ldx)

**DLASCL2** performs diagonal scaling on a matrix.

**Purpose:**

DLASCL2 performs a diagonal scaling on a matrix: x <-- D * x where the diagonal matrix D is stored as a vector. Eventually to be replaced by BLAS_dge_diag_scale in the new BLAS standard.

**Parameters***M*M is INTEGER The number of rows of D and X. M >= 0.

*N*N is INTEGER The number of columns of X. N >= 0.

*D*D is DOUBLE PRECISION array, length M Diagonal matrix D, stored as a vector of length M.

*X*X is DOUBLE PRECISION array, dimension (LDX,N) On entry, the matrix X to be scaled by D. On exit, the scaled matrix.

*LDX*LDX is INTEGER The leading dimension of the matrix X. LDX >= M.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **89** of file **dlascl2.f**.

### subroutine slascl2 (integer m, integer n, real, dimension( * ) d, real, dimension( ldx, * ) x, integer ldx)

**SLASCL2** performs diagonal scaling on a matrix.

**Purpose:**

SLASCL2 performs a diagonal scaling on a matrix: x <-- D * x where the diagonal matrix D is stored as a vector. Eventually to be replaced by BLAS_sge_diag_scale in the new BLAS standard.

**Parameters***M*M is INTEGER The number of rows of D and X. M >= 0.

*N*N is INTEGER The number of columns of X. N >= 0.

*D*D is REAL array, length M Diagonal matrix D, stored as a vector of length M.

*X*X is REAL array, dimension (LDX,N) On entry, the matrix X to be scaled by D. On exit, the scaled matrix.

*LDX*LDX is INTEGER The leading dimension of the matrix X. LDX >= M.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **89** of file **slascl2.f**.

### subroutine zlascl2 (integer m, integer n, double precision, dimension( * ) d, complex*16, dimension( ldx, * ) x, integer ldx)

**ZLASCL2** performs diagonal scaling on a matrix.

**Purpose:**

ZLASCL2 performs a diagonal scaling on a matrix: x <-- D * x where the DOUBLE PRECISION diagonal matrix D is stored as a vector. Eventually to be replaced by BLAS_zge_diag_scale in the new BLAS standard.

**Parameters***M*M is INTEGER The number of rows of D and X. M >= 0.

*N*N is INTEGER The number of columns of X. N >= 0.

*D*D is DOUBLE PRECISION array, length M Diagonal matrix D, stored as a vector of length M.

*X*X is COMPLEX*16 array, dimension (LDX,N) On entry, the matrix X to be scaled by D. On exit, the scaled matrix.

*LDX*LDX is INTEGER The leading dimension of the matrix X. LDX >= M.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **90** of file **zlascl2.f**.

## Author

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