Program f04axfe ! F04AXF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: f01brf, f04axf, nag_wp ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Real (Kind=nag_wp) :: resid, u Integer :: i, ifail, licn, lirn, mtype, n, nz Logical :: grow, lblock ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:), rhs(:), w(:) Integer, Allocatable :: icn(:), ikeep(:,:), irn(:), iw(:,:) Integer :: idisp(10) Logical :: abort(4) ! .. Executable Statements .. Write (nout,*) 'F04AXF Example Program Results' Write (nout,*) ! Skip heading in data file Read (nin,*) Read (nin,*) n, nz licn = 3*nz lirn = 3*nz/2 Allocate (a(licn),rhs(n),w(n),icn(licn),ikeep(n,5),irn(lirn),iw(n,8)) Read (nin,*)(a(i),irn(i),icn(i),i=1,nz) u = 0.1E0_nag_wp lblock = .True. grow = .True. abort(1) = .True. abort(2) = .True. abort(3) = .False. abort(4) = .True. ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 ! Decomposition of sparse matrix Call f01brf(n,nz,a,licn,irn,lirn,icn,u,ikeep,iw,w,lblock,grow,abort, & idisp,ifail) If (grow) Then Write (nout,*) 'On exit from F01BRF' Write (nout,99999) 'Value of W(1) = ', w(1) End If Read (nin,*) rhs(1:n) mtype = 1 ! Approximate solution of sparse linear equations Call f04axf(n,a,licn,icn,ikeep,rhs,w,mtype,idisp,resid) Write (nout,*) Write (nout,*) 'On exit from F04AXF' Write (nout,*) ' Solution' Write (nout,99998) rhs(1:n) 99999 Format (1X,A,F9.4) 99998 Format (1X,F9.4) End Program f04axfe