Program c09fafe ! C09FAF Example Program Text ! Mark 31.1 Release. nAG Copyright 2025. ! .. Use Statements .. Use nag_library, Only: c09acf, c09faf, c09fbf, c09fyf, nag_wp ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 ! .. Local Scalars .. Integer :: cindex, fr, i, ifail, j, lda, ldb, & ldd, lenc, m, n, nf, nwcfr, nwcm, & nwcn, nwct, nwl, sda, sdb, sdd Character (12) :: mode, wavnam, wtrans Character (33) :: title ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:,:,:), b(:,:,:), c(:), d(:,:,:) Integer :: icomm(260) Character (3) :: cpass(0:7) ! .. Executable Statements .. Write (nout,*) 'C09FAF Example Program Results' ! Skip heading in data file Read (nin,*) ! Read problem parameters. Read (nin,*) m, n, fr Read (nin,*) wavnam, mode Write (nout,99999) wavnam, mode lda = m sda = n Allocate (a(lda,sda,fr)) ldb = m sdb = n Allocate (b(ldb,sdb,fr)) ! Read data array Do j = 1, fr Read (nin,*) Read (nin,*)(a(i,1:n,j),i=1,m) End Do Write (nout,99998) 'Input Data A' Do j = 1, fr Write (nout,99996) j Do i = 1, m Write (nout,99997) a(i,1:n,j) End Do End Do ! Query wavelet filter dimensions wtrans = 'Single Level' ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 Call c09acf(wavnam,wtrans,mode,m,n,fr,nwl,nf,nwct,nwcn,nwcfr,icomm, & ifail) nwcm = nwct/(8*nwcn*nwcfr) lenc = nwct Allocate (c(lenc)) ! 3D DWT decomposition ifail = 0 Call c09faf(m,n,fr,a,lda,sda,lenc,c,icomm,ifail) ldd = nwcm sdd = nwcn Allocate (d(ldd,sdd,nwcfr)) ! Loop over low/high passes from LLL to HHH cpass(0:7) = (/'LLL','LLH','LHL','LHH','HLL','HLH','HHL','HHH'/) Do cindex = 0, 7 If (cindex==0) Then title = 'Approximation coefficients (LLL)' Else title = 'Detail coefficients (' // cpass(cindex) // ')' End If ! Extract coefficients Call c09fyf(0,cindex,lenc,c,d,ldd,sdd,icomm,ifail) Write (nout,99992) title Write (nout,99995)('Frame ',j,j=1,nwcfr) Write (nout,99994) cindex, (d(1,1:nwcn,j),j=1,nwcfr) Do i = 2, nwcm Write (nout,99993)(d(i,1:nwcn,j),j=1,nwcfr) End Do End Do ! 3D DWT reconstruction ifail = 0 Call c09fbf(m,n,fr,lenc,c,b,ldb,sdb,icomm,ifail) Write (nout,99998) 'Output Data B' Do j = 1, fr Write (nout,99996) j Do i = 1, m Write (nout,99997) b(i,1:n,j) End Do End Do 99999 Format (/,1X,'DWT ::',/,1X,' Wavelet : ',A,/,1X, & ' End mode: ',A) 99998 Format (/,1X,A,' : ') 99997 Format (1X,8(F8.4,1X),:) 99996 Format (1X,'Frame ',I2,' : ') 99995 Format (11X,6(10X,A,I2)) 99994 Format (4X,I4,6X,8(1X,F8.4)) 99993 Format (14X,8(1X,F8.4)) 99992 Format (/,1X,A) End Program c09fafe