GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 4.8 |
i386 |
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dlascl(l) |
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DLASCL - multiplie the M by N real matrix A by the real scalar CTO/CFROM
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SUBROUTINE DLASCL( |
TYPE, KL, KU, CFROM, CTO, M, N, A, LDA, INFO ) | ||
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CHARACTER |
TYPE | ||
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INTEGER |
INFO, KL, KU, LDA, M, N | ||
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DOUBLE |
PRECISION CFROM, CTO | ||
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DOUBLE |
PRECISION A( LDA, * ) |
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.
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.
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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dlascl(l) | |