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    1: *> \brief \b DLASCL2 performs diagonal scaling on a vector.
    2: *
    3: *  =========== DOCUMENTATION ===========
    4: *
    5: * Online html documentation available at 
    6: *            http://www.netlib.org/lapack/explore-html/ 
    7: *
    8: *> \htmlonly
    9: *> Download DLASCL2 + dependencies 
   10: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlascl2.f"> 
   11: *> [TGZ]</a> 
   12: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlascl2.f"> 
   13: *> [ZIP]</a> 
   14: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlascl2.f"> 
   15: *> [TXT]</a>
   16: *> \endhtmlonly 
   17: *
   18: *  Definition:
   19: *  ===========
   20: *
   21: *       SUBROUTINE DLASCL2 ( M, N, D, X, LDX )
   22: * 
   23: *       .. Scalar Arguments ..
   24: *       INTEGER            M, N, LDX
   25: *       ..
   26: *       .. Array Arguments ..
   27: *       DOUBLE PRECISION   D( * ), X( LDX, * )
   28: *       ..
   29: *  
   30: *
   31: *> \par Purpose:
   32: *  =============
   33: *>
   34: *> \verbatim
   35: *>
   36: *> DLASCL2 performs a diagonal scaling on a vector:
   37: *>   x <-- D * x
   38: *> where the diagonal matrix D is stored as a vector.
   39: *>
   40: *> Eventually to be replaced by BLAS_dge_diag_scale in the new BLAS
   41: *> standard.
   42: *> \endverbatim
   43: *
   44: *  Arguments:
   45: *  ==========
   46: *
   47: *> \param[in] M
   48: *> \verbatim
   49: *>          M is INTEGER
   50: *>     The number of rows of D and X. M >= 0.
   51: *> \endverbatim
   52: *>
   53: *> \param[in] N
   54: *> \verbatim
   55: *>          N is INTEGER
   56: *>     The number of columns of X. N >= 0.
   57: *> \endverbatim
   58: *>
   59: *> \param[in] D
   60: *> \verbatim
   61: *>          D is DOUBLE PRECISION array, length M
   62: *>     Diagonal matrix D, stored as a vector of length M.
   63: *> \endverbatim
   64: *>
   65: *> \param[in,out] X
   66: *> \verbatim
   67: *>          X is DOUBLE PRECISION array, dimension (LDX,N)
   68: *>     On entry, the vector X to be scaled by D.
   69: *>     On exit, the scaled vector.
   70: *> \endverbatim
   71: *>
   72: *> \param[in] LDX
   73: *> \verbatim
   74: *>          LDX is INTEGER
   75: *>     The leading dimension of the vector X. LDX >= M.
   76: *> \endverbatim
   77: *
   78: *  Authors:
   79: *  ========
   80: *
   81: *> \author Univ. of Tennessee 
   82: *> \author Univ. of California Berkeley 
   83: *> \author Univ. of Colorado Denver 
   84: *> \author NAG Ltd. 
   85: *
   86: *> \date June 2016
   87: *
   88: *> \ingroup doubleOTHERcomputational
   89: *
   90: *  =====================================================================
   91:       SUBROUTINE DLASCL2 ( M, N, D, X, LDX )
   92: *
   93: *  -- LAPACK computational routine (version 3.6.1) --
   94: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
   95: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
   96: *     June 2016
   97: *
   98: *     .. Scalar Arguments ..
   99:       INTEGER            M, N, LDX
  100: *     ..
  101: *     .. Array Arguments ..
  102:       DOUBLE PRECISION   D( * ), X( LDX, * )
  103: *     ..
  104: *
  105: *  =====================================================================
  106: *
  107: *     .. Local Scalars ..
  108:       INTEGER            I, J
  109: *     ..
  110: *     .. Executable Statements ..
  111: *
  112:       DO J = 1, N
  113:          DO I = 1, M
  114:             X( I, J ) = X( I, J ) * D( I )
  115:          END DO
  116:       END DO
  117: 
  118:       RETURN
  119:       END