Program f01zcfe ! F01ZCF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: f01zcf, nag_wp, x04caf ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Integer :: i, ifail, kl, ku, lda, ldb, m, n ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:,:), b(:,:) ! .. Executable Statements .. Write (nout,*) 'F01ZCF Example Program Results' ! Skip heading in data file Read (nin,*) Write (nout,*) Flush (nout) Read (nin,*) m, n, kl, ku lda = n ldb = lda Allocate (a(lda,n),b(ldb,n)) ! Read a banded matrix of size m by n. kl is the number of ! sub-diagonals, ku the number of super-diagonals. Do i = 1, n Read (nin,*) a(i,1:n) End Do ! Clear the packed matrix array B, so that no elements are ! unassigned when we print B later. b(1:(kl+ku+1),1:n) = 0.0E+0_nag_wp ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 ! Print the unpacked matrix Call x04caf('G','X',n,n,a,lda,'Unpacked Matrix A:',ifail) Write (nout,*) Flush (nout) ! Convert to packed matrix form ifail = 0 Call f01zcf('Pack',m,n,kl,ku,a,lda,b,ldb,ifail) ! Print the packed matrix ifail = 0 Call x04caf('G','X',kl+ku+1,n,b,ldb,'Packed Matrix B:',ifail) End Program f01zcfe