Program f11jafe ! F11JAF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: f11jaf, nag_wp ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Real (Kind=nag_wp) :: dscale, dtol Integer :: i, ifail, la, lfill, liwork, n, nnz, & nnzc, npivm Character (1) :: mic, pstrat ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:) Integer, Allocatable :: icol(:), ipiv(:), irow(:), istr(:), & iwork(:) ! .. Executable Statements .. Write (nout,*) 'F11JAF Example Program Results' ! Skip heading in data file Read (nin,*) ! Read algorithmic parameters Read (nin,*) n Read (nin,*) nnz la = 2*nnz liwork = 2*la + 7*n + 1 Allocate (a(la),icol(la),ipiv(n),irow(la),istr(n+1),iwork(liwork)) Read (nin,*) lfill, dtol Read (nin,*) mic, dscale Read (nin,*) pstrat ! Read the matrix A Do i = 1, nnz Read (nin,*) a(i), irow(i), icol(i) End Do ! Calculate incomplete Cholesky factorization ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 Call f11jaf(n,nnz,a,la,irow,icol,lfill,dtol,mic,dscale,pstrat,ipiv,istr, & nnzc,npivm,iwork,liwork,ifail) ! Output original matrix Write (nout,*) ' Original Matrix' Write (nout,99997) 'N =', n Write (nout,99997) 'NNZ =', nnz Do i = 1, nnz Write (nout,99999) i, a(i), irow(i), icol(i) End Do Write (nout,*) ! Output details of the factorization Write (nout,*) ' Factorization' Write (nout,99997) 'N =', n Write (nout,99997) 'NNZ =', nnzc Write (nout,99997) 'NPIVM =', npivm Do i = nnz + 1, nnz + nnzc Write (nout,99999) i, a(i), irow(i), icol(i) End Do Write (nout,*) Write (nout,*) ' I IPIV(I)' Do i = 1, n Write (nout,99998) i, ipiv(i) End Do 99999 Format (1X,I8,E16.4,2I8) 99998 Format (1X,2I8) 99997 Format (1X,A,I16) End Program f11jafe