109 lines
3.1 KiB
Fortran
109 lines
3.1 KiB
Fortran
SUBROUTINE MA02AD( JOB, M, N, A, LDA, B, LDB )
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C
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C SLICOT RELEASE 5.0.
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C
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C Copyright (c) 2002-2009 NICONET e.V.
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C
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C This program is free software: you can redistribute it and/or
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C modify it under the terms of the GNU General Public License as
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C published by the Free Software Foundation, either version 2 of
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C the License, or (at your option) any later version.
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C
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C This program is distributed in the hope that it will be useful,
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C but WITHOUT ANY WARRANTY; without even the implied warranty of
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C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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C GNU General Public License for more details.
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C
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C You should have received a copy of the GNU General Public License
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C along with this program. If not, see
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C <http://www.gnu.org/licenses/>.
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C
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C PURPOSE
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C
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C To transpose all or part of a two-dimensional matrix A into
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C another matrix B.
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C
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C ARGUMENTS
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C
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C Mode Parameters
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C
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C JOB CHARACTER*1
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C Specifies the part of the matrix A to be transposed into B
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C as follows:
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C = 'U': Upper triangular part;
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C = 'L': Lower triangular part;
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C Otherwise: All of the matrix A.
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C
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C Input/Output Parameters
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C
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C M (input) INTEGER
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C The number of rows of the matrix A. M >= 0.
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C
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C N (input) INTEGER
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C The number of columns of the matrix A. N >= 0.
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C
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C A (input) DOUBLE PRECISION array, dimension (LDA,N)
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C The m-by-n matrix A. If JOB = 'U', only the upper
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C triangle or trapezoid is accessed; if JOB = 'L', only the
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C lower triangle or trapezoid is accessed.
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C
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C LDA INTEGER
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C The leading dimension of the array A. LDA >= max(1,M).
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C
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C B (output) DOUBLE PRECISION array, dimension (LDB,M)
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C B = A' in the locations specified by JOB.
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C
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C LDB INTEGER
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C The leading dimension of the array B. LDB >= max(1,N).
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C
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C CONTRIBUTOR
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C
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C A. Varga, German Aerospace Center,
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C DLR Oberpfaffenhofen, March 1998.
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C Based on the RASP routine DMTRA.
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C
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C REVISIONS
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C
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C -
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C
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C ******************************************************************
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C
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C .. Scalar Arguments ..
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CHARACTER JOB
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INTEGER LDA, LDB, M, N
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C .. Array Arguments ..
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DOUBLE PRECISION A(LDA,*), B(LDB,*)
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C .. Local Scalars ..
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INTEGER I, J
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C .. External Functions ..
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LOGICAL LSAME
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EXTERNAL LSAME
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C .. Intrinsic Functions ..
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INTRINSIC MIN
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C
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C .. Executable Statements ..
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C
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IF( LSAME( JOB, 'U' ) ) THEN
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DO 20 J = 1, N
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DO 10 I = 1, MIN( J, M )
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B(J,I) = A(I,J)
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10 CONTINUE
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20 CONTINUE
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ELSE IF( LSAME( JOB, 'L' ) ) THEN
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DO 40 J = 1, N
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DO 30 I = J, M
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B(J,I) = A(I,J)
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30 CONTINUE
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40 CONTINUE
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ELSE
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DO 60 J = 1, N
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DO 50 I = 1, M
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B(J,I) = A(I,J)
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50 CONTINUE
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60 CONTINUE
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END IF
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C
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RETURN
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C *** Last line of MA02AD ***
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END
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