SLASCL - multiplie the M by N real matrix A by the real
scalar CTO/CFROM
SYNOPSIS
SUBROUTINE SLASCL( TYPE, KL, KU, CFROM, CTO, M, N, A, LDA,
INFO )
CHARACTER TYPE
INTEGER INFO, KL, KU, LDA, M, N
REAL CFROM, CTO
REAL A( LDA, * )
PURPOSE
SLASCL 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 sym
metric 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) REAL
CTO (input) REAL The matrix A is multiplied by
CTO/CFROM. A(I,J) is computed without over/under
flow if the final result CTO*A(I,J)/CFROM can be
represented without over/underflow. CFROM must be
nonzero.
The number of rows of the matrix A. M >= 0.
N (input) INTEGER
The number of columns of the matrix A. N >= 0.
A (input/output) REAL 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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