Visible to Intel only — GUID: GUID-4E4F2F4E-7152-4BC5-9BC5-ADA7EB9FBBA2
Visible to Intel only — GUID: GUID-4E4F2F4E-7152-4BC5-9BC5-ADA7EB9FBBA2
?lascl
Multiplies a general rectangular matrix by a real scalar defined as cto/cfrom.
Syntax
call slascl( type, kl, ku, cfrom, cto, m, n, a, lda, info )
call dlascl( type, kl, ku, cfrom, cto, m, n, a, lda, info )
call clascl( type, kl, ku, cfrom, cto, m, n, a, lda, info )
call zlascl( type, kl, ku, cfrom, cto, m, n, a, lda, info )
Include Files
- mkl.fi
Description
The routine ?lascl multiplies the m-by-n real/complex matrix A by the real scalar cto/cfrom. The operation is performed without over/underflow as long as the final result cto*A(i,j)/cfrom does not over/underflow.
type specifies that A may be full, upper triangular, lower triangular, upper Hessenberg, or banded.
Input Parameters
- type
-
CHARACTER*1. This parameter specifies the storage type of the input matrix.
= 'G': A is a full matrix.
= 'L': A is a lower triangular matrix.
= 'U': A is an upper triangular matrix.
= 'H': A is an upper Hessenberg matrix.
= 'B': A is a symmetric band matrix with lower bandwidth kl and upper bandwidth ku and with the only the lower half stored
= 'Q': A is a symmetric band matrix with lower bandwidth kl and upper bandwidth ku and with the only the upper half stored.
= 'Z': A is a band matrix with lower bandwidth kl and upper bandwidth ku. See description of the ?gbtrf function for storage details.
- kl
-
INTEGER. The lower bandwidth of A. Referenced only if type = 'B', 'Q' or 'Z'.
- ku
-
INTEGER. The upper bandwidth of A. Referenced only if type = 'B', 'Q' or 'Z'.
- cfrom, cto
-
REAL for slascl/clascl
DOUBLE PRECISION for dlascl/zlascl
The matrix A is multiplied by cto/cfrom. A(i,j) is computed without over/underflow if the final result cto*A(i,j)/cfrom can be represented without over/underflow. cfrom must be nonzero.
- m
-
INTEGER. The number of rows of the matrix A. m≥ 0.
- n
-
INTEGER. The number of columns of the matrix A. n≥ 0.
- a
-
REAL for slascl
DOUBLE PRECISION for dlascl
COMPLEX for clascl
DOUBLE COMPLEX for zlascl
Array, size (lda, n). The matrix to be multiplied by cto/cfrom. See type for the storage type.
- lda
-
INTEGER. The leading dimension of the array a.
lda≥ max(1,m).
Output Parameters
- a
-
The multiplied matrix A.
- info
-
INTEGER.
If info = 0 - successful exit
If info = -i < 0, the i-th argument had an illegal value.