clacp2()

subroutine clacp2	(	character	UPLO,
		integer	M,
		integer	N,
		real, dimension( lda, * )	A,
		integer	LDA,
		complex, dimension( ldb, * )	B,
		integer	LDB
	)

CLACP2 copies all or part of a real two-dimensional array to a complex array.

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Purpose:

 CLACP2 copies all or part of a real two-dimensional matrix A to a
 complex matrix B.

Parameters

[in]	UPLO	UPLO is 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
[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]	A	A is REAL array, dimension (LDA,N) The m by n matrix A. If UPLO = 'U', only the upper trapezium is accessed; if UPLO = 'L', only the lower trapezium is accessed.
[in]	LDA	LDA is INTEGER The leading dimension of the array A. LDA >= max(1,M).
[out]	B	B is COMPLEX array, dimension (LDB,N) On exit, B = A in the locations specified by UPLO.
[in]	LDB	LDB is INTEGER The leading dimension of the array B. LDB >= max(1,M).

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date

December 2016

Definition at line 106 of file clacp2.f.

*
*  -- LAPACK auxiliary routine (version 3.7.0) --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*     December 2016
*
*     .. Scalar Arguments ..
      CHARACTER          UPLO
      INTEGER            LDA, LDB, M, N
*     ..
*     .. Array Arguments ..
      REAL               A( LDA, * )
      COMPLEX            B( LDB, * )
*     ..
*
*  =====================================================================
*
*     .. Local Scalars ..
      INTEGER            I, J
*     ..
*     .. External Functions ..
      LOGICAL            LSAME
      EXTERNAL           lsame
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          min
*     ..
*     .. Executable Statements ..
*
      IF( lsame( uplo, 'U' ) ) THEN
         DO 20 j = 1, n
            DO 10 i = 1, min( j, m )
               b( i, j ) = a( i, j )
   10       CONTINUE
   20    CONTINUE
*
      ELSE IF( lsame( uplo, 'L' ) ) THEN
         DO 40 j = 1, n
            DO 30 i = j, m
               b( i, j ) = a( i, j )
   30       CONTINUE
   40    CONTINUE
*
      ELSE
         DO 60 j = 1, n
            DO 50 i = 1, m
               b( i, j ) = a( i, j )
   50       CONTINUE
   60    CONTINUE
      END IF
*
      RETURN
*
*     End of CLACP2
*

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