LAPACK  3.4.2
LAPACK: Linear Algebra PACKage
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zlascl.f File Reference

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Functions/Subroutines

subroutine zlascl (TYPE, KL, KU, CFROM, CTO, M, N, A, LDA, INFO)
 ZLASCL multiplies a general rectangular matrix by a real scalar defined as cto/cfrom.

Function/Subroutine Documentation

subroutine zlascl ( character  TYPE,
integer  KL,
integer  KU,
double precision  CFROM,
double precision  CTO,
integer  M,
integer  N,
complex*16, dimension( lda, * )  A,
integer  LDA,
integer  INFO 
)

ZLASCL multiplies a general rectangular matrix by a real scalar defined as cto/cfrom.

Download ZLASCL + dependencies [TGZ] [ZIP] [TXT]
Purpose: 
 ZLASCL 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.
Parameters:
[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 ZGBTRF 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 DOUBLE PRECISION
[in]CTO
          CTO is 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.
[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*16 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.  LDA >= max(1,M).
[out]INFO
          INFO is INTEGER
          0  - successful exit
          <0 - if INFO = -i, the i-th argument had an illegal value.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012

Definition at line 140 of file zlascl.f.

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