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dlacpy

 NAME
      DLACPY - copy all or part of a two-dimensional matrix A to
      another matrix B

 SYNOPSIS
      SUBROUTINE DLACPY( UPLO, M, N, A, LDA, B, LDB )

          CHARACTER      UPLO

          INTEGER        LDA, LDB, M, N

          DOUBLE         PRECISION A( LDA, * ), B( LDB, * )

 PURPOSE
      DLACPY copies all or part of a two-dimensional matrix A to
      another matrix B.

 ARGUMENTS
      UPLO    (input) CHARACTER*1
              Specifies the part of the matrix A to be copied to
              B.  = 'U':      Upper triangular part
              = 'L':      Lower triangular part
              Otherwise:  All of the matrix A

      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) DOUBLE PRECISION array, dimension (LDA,N)
              The m by n matrix A.  If UPLO = 'U', only the upper
              triangle or trapezoid is accessed; if UPLO = 'L',
              only the lower triangle or trapezoid is accessed.

      LDA     (input) INTEGER
              The leading dimension of the array A.  LDA >=
              max(1,M).

      B       (output) DOUBLE PRECISION array, dimension (LDB,N)
              On exit, B = A in the locations specified by UPLO.

      LDB     (input) INTEGER
              The leading dimension of the array B.  LDB >=
              max(1,M).