Program f01ekfe ! F01EKF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: f01ekf, nag_wp, x04caf ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Real (Kind=nag_wp) :: imnorm Integer :: i, ifail, lda, n Character (4) :: fun Character (20) :: fun_name ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:,:) ! .. Executable Statements .. Write (nout,*) 'F01EKF Example Program Results' Write (nout,*) ! Skip heading in data file Read (nin,*) Read (nin,*) n, fun lda = n Allocate (a(lda,n)) ! Read A from data file Read (nin,*)(a(i,1:n),i=1,n) ! Find f( A ) ifail = 0 Call f01ekf(fun,n,a,lda,imnorm,ifail) ! Print solution Write (fun_name,Fmt='(3(A))') 'F(A) = ', fun, '(A)' Write (nout,*) ifail = 0 Call x04caf('G','N',n,n,a,lda,fun_name,ifail) ! Print the norm of the imaginary part to check it is small Write (nout,*) Write (nout,Fmt='(1X,A,F6.2)') 'Imnorm =', imnorm End Program f01ekfe