Program f11dafe ! F11DAF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: f11daf, nag_wp ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Real (Kind=nag_wp) :: dtol Integer :: i, ifail, la, lfill, liwork, n, nnz, & nnzc, npivm Character (1) :: milu, pstrat ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:) Integer, Allocatable :: icol(:), idiag(:), ipivp(:), & ipivq(:), irow(:), istr(:), iwork(:) ! .. Executable Statements .. Write (nout,*) 'F11DAF Example Program Results' Write (nout,*) ! Skip heading in data file Read (nin,*) ! Read algorithmic parameters Read (nin,*) n Read (nin,*) nnz la = 2*nnz liwork = 7*n + 2 Allocate (a(la),icol(la),idiag(n),ipivp(n),ipivq(n),irow(la),istr(n+1), & iwork(liwork)) Read (nin,*) lfill, dtol Read (nin,*) pstrat Read (nin,*) milu ! Read the matrix A Do i = 1, nnz Read (nin,*) a(i), irow(i), icol(i) End Do ! Calculate incomplete LU factorization ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 Call f11daf(n,nnz,a,la,irow,icol,lfill,dtol,pstrat,milu,ipivp,ipivq, & istr,idiag,nnzc,npivm,iwork,liwork,ifail) ! Output original matrix Write (nout,*) ' Original Matrix' Write (nout,'(A,I4)') ' N =', n Write (nout,'(A,I4)') ' NNZ =', nnz Do i = 1, nnz Write (nout,'(I8,E16.4,2I8)') i, a(i), irow(i), icol(i) End Do Write (nout,*) ! Output details of the factorization Write (nout,*) ' Factorization' Write (nout,'(A,I4)') ' N =', n Write (nout,'(A,I4)') ' NNZ =', nnzc Write (nout,'(A,I4)') ' NPIVM =', npivm Do i = nnz + 1, nnz + nnzc Write (nout,'(I8,E16.4,2I8)') i, a(i), irow(i), icol(i) End Do Write (nout,*) Write (nout,*) ' I IPIVP(I) IPIVQ(I)' Do i = 1, n Write (nout,'(3I10)') i, ipivp(i), ipivq(i) End Do End Program f11dafe