1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
.TH SLASCL l "15 June 2000" "LAPACK version 3.0" ")"
.SH NAME
SLASCL - multiplie the M by N real matrix A by the real scalar CTO/CFROM
.SH SYNOPSIS
.TP 19
SUBROUTINE SLASCL(
TYPE, KL, KU, CFROM, CTO, M, N, A, LDA, INFO )
.TP 19
.ti +4
CHARACTER
TYPE
.TP 19
.ti +4
INTEGER
INFO, KL, KU, LDA, M, N
.TP 19
.ti +4
REAL
CFROM, CTO
.TP 19
.ti +4
REAL
A( LDA, * )
.SH 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.
.br
.SH ARGUMENTS
.TP 8
TYPE (input) CHARACTER*1
TYPE indices the storage type of the input matrix.
= 'G': A is a full matrix.
.br
= 'L': A is a lower triangular matrix.
.br
= 'U': A is an upper triangular matrix.
.br
= 'H': A is an upper Hessenberg matrix.
.br
= '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.
.TP 8
KL (input) INTEGER
The lower bandwidth of A. Referenced only if TYPE = 'B',
'Q' or 'Z'.
.TP 8
KU (input) INTEGER
The upper bandwidth of A. Referenced only if TYPE = 'B',
'Q' or 'Z'.
.TP 8
CFROM (input) REAL
CTO (input) REAL
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.
.TP 8
M (input) INTEGER
The number of rows of the matrix A. M >= 0.
.TP 8
N (input) INTEGER
The number of columns of the matrix A. N >= 0.
.TP 8
A (input/output) REAL array, dimension (LDA,M)
The matrix to be multiplied by CTO/CFROM. See TYPE for the
storage type.
.TP 8
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,M).
.TP 8
INFO (output) INTEGER
0 - successful exit
<0 - if INFO = -i, the i-th argument had an illegal value.
|
