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1985-11-29
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47 lines
C
C ..................................................................
C
C SUBROUTINE DCPY
C
C PURPOSE
C COPY DIAGONAL ELEMENTS OF A MATRIX INTO A VECTOR
C
C USAGE
C CALL DCPY (A,R,N,MS)
C
C DESCRIPTION OF PARAMETERS
C A - NAME OF INPUT MATRIX
C R - NAME OF OUTPUT VECTOR OF LENGTH N
C N - NUMBER OF ROWS AND COLUMNS IN MATRIX A
C MS - ONE DIGIT NUMBER FOR STORAGE MODE OF MATRIX A
C 0 - GENERAL
C 1 - SYMMETRIC
C 2 - DIAGONAL
C
C REMARKS
C INPUT MATRIX MUST BE A SQUARE MATRIX
C
C SUBROUTINES AND FUNCTION SUBPROGRAMS REQUIRED
C LOC
C
C METHOD
C ELEMENTS ON DIAGONAL OF MATRIX ARE MOVED TO CORRESPONDING
C POSITIONS OF VECTOR R
C
C ..................................................................
C
SUBROUTINE DCPY(A,R,N,MS)
DIMENSION A(1),R(1)
C
DO 3 J=1,N
C
C LOCATE DIAGONAL ELEMENT FOR ANY MATRIX STORAGE MODE
C
CALL LOC(J,J,IJ,N,N,MS)
C
C MOVE DIAGONAL ELEMENT TO VECTOR R
C
3 R(J)=A(IJ)
RETURN
END