DLASCL(3F)DLASCL(3F)NAME
DLASCL - multiplie the M by N real matrix A by the real scalar CTO/CFROM
SYNOPSIS
SUBROUTINE DLASCL( TYPE, KL, KU, CFROM, CTO, M, N, A, LDA, INFO )
CHARACTER TYPE
INTEGER INFO, KL, KU, LDA, M, N
DOUBLE PRECISION CFROM, CTO
DOUBLE PRECISION A( LDA, * )
PURPOSE
DLASCL multiplies the M by N real matrix A by the real scalar CTO/CFROM.
This is done 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.
ARGUMENTS
TYPE (input) CHARACTER*1
TYPE indices 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.
KL (input) INTEGER
The lower bandwidth of A. Referenced only if TYPE = 'B',
KU (input) INTEGER
The upper bandwidth of A. Referenced only if TYPE = 'B',
CFROM (input) DOUBLE PRECISION
CTO (input) DOUBLE PRECISION 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 (input) INTEGER
The number of rows of the matrix A. M >= 0.
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DLASCL(3F)DLASCL(3F)
N (input) INTEGER
The number of columns of the matrix A. N >= 0.
A (input/output) DOUBLE PRECISION array, dimension (LDA,M)
The matrix to be multiplied by CTO/CFROM. See TYPE for the
storage type.
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,M).
INFO (output) INTEGER
0 - successful exit <0 - if INFO = -i, the i-th argument had an
illegal value.
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