Program f01zafe ! F01ZAF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: f01zaf, nag_wp, x04cbf ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Integer :: i, ifail, lb, lda, lenb, n Character (1) :: diag, uplo ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:,:), b(:) Character (1) :: clabs(1), rlabs(1) ! .. Executable Statements .. Write (nout,*) 'F01ZAF Example Program Results' ! Skip heading in data file Read (nin,*) Write (nout,*) Flush (nout) Read (nin,*) n, uplo, diag lda = n lenb = (n*(n+1))/2 Allocate (a(lda,n),b(lenb)) ! Read a triangular matrix of order n Do i = 1, n Read (nin,*) a(i,1:n) End Do ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 ! Print the unpacked matrix Call x04cbf(uplo,diag,n,n,a,lda,'F5.2','Unpacked Matrix A:','I',rlabs, & 'I',clabs,80,0,ifail) Write (nout,*) Flush (nout) ! Convert to packed vector form ifail = 0 Call f01zaf('Pack',uplo,diag,n,a,lda,b,ifail) lb = n*(n+1)/2 ! Print the packed vector ifail = 0 Call x04cbf('G','X',lb,1,b,lb,'F5.2','Packed Vector B:','I',rlabs,'N', & clabs,80,0,ifail) End Program f01zafe