File: MFUN.FT of Tape: Various/ETH/eth11-1
(Source file text)
C .................................................................. C C SUBROUTINE MFUN C C PURPOSE C APPLY A FUNCTION TO EACH ELEMENT OF A MATRIX TO FORM A C RESULTANT MATRIX C C USAGE C CALL MFUN (A,F,R,N,M,MS) C AN EXTERNAL STATEMENT MUST PRECEDE CALL STATEMENT IN ORDER C TO IDENTIFY PARAMETER F AS THE NAME OF A FUNCTION C C DESCRIPTION OF PARAMETERS C A - NAME OF INPUT MATRIX C F - NAME OF FORTRAN-FURNISHED OR USER FUNCTION SUBPROGRAM C R - NAME OF OUTPUT MATRIX C N - NUMBER OF ROWS IN MATRIX A AND R C M - NUMBER OF COLUMNS IN MATRIX A AND R C MS - ONE DIGIT NUMBER FOR STORAGE MODE OF MATRIX A (AND R) C 0 - GENERAL C 1 - SYMMETRIC C 2 - DIAGONAL C C REMARKS C PRECISION IS DEPENDENT UPON PRECISION OF FUNCTION USED C C SUBROUTINES AND FUNCTION SUBPROGRAMS REQUIRED C LOC C C METHOD C FUNCTION F IS APPLIED TO EACH ELEMENT OF MATRIX A C TO FORM MATRIX R C C .................................................................. C SUBROUTINE MFUN(A,F,R,N,M,MS) DIMENSION A(1),R(1) C C COMPUTE VECTOR LENGTH, IT C CALL LOC(N,M,IT,N,M,MS) C C BUILD MATRIX R FOR ANY STORAGE MODE C DO 5 I=1,IT 5 R(I)=F(A(I)) RETURN END C