Program c06psfe ! C06PSF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: c06psf, nag_wp ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Integer :: i, ieof, ifail, j, m, n ! .. Local Arrays .. Complex (Kind=nag_wp), Allocatable :: work(:), x(:) ! .. Intrinsic Procedures .. Intrinsic :: aimag, real ! .. Executable Statements .. Write (nout,*) 'C06PSF Example Program Results' ! Skip heading in data file Read (nin,*) loop: Do Read (nin,*,Iostat=ieof) m, n If (ieof<0) Exit loop Allocate (work(n*m+n+15),x(m*n)) Do j = 1, m*n, n Read (nin,*)(x(j+i),i=0,n-1) End Do Write (nout,*) Write (nout,*) 'Original data values' Do j = 1, m*n, n Write (nout,*) Write (nout,99999) 'Real ', (real(x(j+i)),i=0,n-1) Write (nout,99999) 'Imag ', (aimag(x(j+i)),i=0,n-1) End Do ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 Call c06psf('F',n,m,x,work,ifail) Write (nout,*) Write (nout,*) 'Discrete Fourier transforms' Do j = 1, m*n, n Write (nout,*) Write (nout,99999) 'Real ', (real(x(j+i)),i=0,n-1) Write (nout,99999) 'Imag ', (aimag(x(j+i)),i=0,n-1) End Do Call c06psf('B',n,m,x,work,ifail) Write (nout,*) Write (nout,*) 'Original data as restored by inverse transform' Do j = 1, m*n, n Write (nout,*) Write (nout,99999) 'Real ', (real(x(j+i)),i=0,n-1) Write (nout,99999) 'Imag ', (aimag(x(j+i)),i=0,n-1) End Do Deallocate (x,work) End Do loop 99999 Format (1X,A,6F10.4) End Program c06psfe