Program c09cafe

!     C09CAF Example Program Text

!     Mark 27.2 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: c09aaf, c09caf, c09cbf, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Integer                          :: ifail, n, nf, nwc, nwl, ny
      Character (12)                   :: mode, wavnam, wtrans
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: ca(:), cd(:), x(:), y(:)
      Integer                          :: icomm(100)
!     .. Executable Statements ..
      Write (nout,*) 'C09CAF Example Program Results'
!     Skip heading in data file
      Read (nin,*)
!     Read problem parameters.
      Read (nin,*) n
      Read (nin,*) wavnam, mode
      Allocate (x(n),y(n))

      Write (nout,99999) wavnam, mode
!     Read array
      Read (nin,*) x(1:n)
      Write (nout,*) 'Input Data      X :'
      Write (nout,99997) x(1:n)
!     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 c09aaf(wavnam,wtrans,mode,n,nwl,nf,nwc,icomm,ifail)

      Allocate (ca(nwc),cd(nwc))

      ifail = 0
      Call c09caf(n,x,nwc,ca,cd,icomm,ifail)

      Write (nout,99998)
      Write (nout,99997) ca(1:nwc)
      Write (nout,99996)
      Write (nout,99997) cd(1:nwc)

      ny = n

      ifail = 0
      Call c09cbf(nwc,ca,cd,ny,y,icomm,ifail)

      Write (nout,99995)
      Write (nout,99997) y(1:ny)

99999 Format (1X,'DWT :: Wavelet: ',A,', End mode: ',A)
99998 Format (1X,'Approximation coefficients CA : ')
99997 Format (1X,8(F8.4,1X),:)
99996 Format (1X,'Detail coefficients        CD : ')
99995 Format (1X,'Reconstruction              Y : ')
    End Program c09cafe