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LAPACK
3.7.0
LAPACK: Linear Algebra PACKage
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subroutine clascl | ( | character | TYPE, |
integer | KL, | ||
integer | KU, | ||
real | CFROM, | ||
real | CTO, | ||
integer | M, | ||
integer | N, | ||
complex, dimension( lda, * ) | A, | ||
integer | LDA, | ||
integer | INFO | ||
) |
CLASCL multiplies a general rectangular matrix by a real scalar defined as cto/cfrom.
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CLASCL multiplies the M by N complex 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.
[in] | TYPE | TYPE is 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. See CGBTRF for storage details. |
[in] | KL | KL is INTEGER The lower bandwidth of A. Referenced only if TYPE = 'B', 'Q' or 'Z'. |
[in] | KU | KU is INTEGER The upper bandwidth of A. Referenced only if TYPE = 'B', 'Q' or 'Z'. |
[in] | CFROM | CFROM is REAL |
[in] | CTO | CTO is 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. |
[in] | M | M is INTEGER The number of rows of the matrix A. M >= 0. |
[in] | N | N is INTEGER The number of columns of the matrix A. N >= 0. |
[in,out] | A | A is COMPLEX array, dimension (LDA,N) The matrix to be multiplied by CTO/CFROM. See TYPE for the storage type. |
[in] | LDA | LDA is INTEGER The leading dimension of the array A. If TYPE = 'G', 'L', 'U', 'H', LDA >= max(1,M); TYPE = 'B', LDA >= KL+1; TYPE = 'Q', LDA >= KU+1; TYPE = 'Z', LDA >= 2*KL+KU+1. |
[out] | INFO | INFO is INTEGER 0 - successful exit <0 - if INFO = -i, the i-th argument had an illegal value. |
Definition at line 145 of file clascl.f.