Program g13cbfe

!     G13CBF Example Program Text

!     Mark 28.4 Release. NAG Copyright 2022.

!     .. Use Statements ..
      Use nag_library, Only: g13cbf, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: pw, px
      Integer                          :: i, ifail, kc, l, lg, lxg, mtx, mw,   &
                                          ng, nx
!     .. Local Arrays ..
      Real (Kind=nag_wp)               :: stats(4)
      Real (Kind=nag_wp), Allocatable  :: xg(:)
!     .. Intrinsic Procedures ..
      Intrinsic                        :: max
!     .. Executable Statements ..
      Write (nout,*) 'G13CBF Example Program Results'
      Write (nout,*)

!     Skip heading in data file
      Read (nin,*)

!     Read in the problem size
      Read (nin,*) nx

!     Read in smoothing parameters
      Read (nin,*) mtx, px, mw, l, kc, lg
      If (mw/=nx) Then
        Read (nin,*) pw
      End If

      lxg = max(kc,nx)
      Allocate (xg(lxg))

!     Read in series
      Read (nin,*) xg(1:nx)

!     Calculate smooth spectrum
      ifail = -1
      Call g13cbf(nx,mtx,px,mw,pw,l,kc,lg,xg,ng,stats,ifail)
      If (ifail/=0) Then
        If (ifail<4) Then
          Go To 100
        End If
      End If

!     Display results
      If (mw==nx) Then
        Write (nout,*) 'No smoothing'
      Else
        Write (nout,99999) 'Frequency width of smoothing window = 1/', mw
      End If
      Write (nout,99998) 'Degrees of freedom =', stats(1),                     &
        '      Bandwidth =', stats(4)
      Write (nout,*)
      Write (nout,99997) '95 percent confidence limits -   Lower = ',          &
        stats(2), '  Upper = ', stats(3)
      Write (nout,*)
      Write (nout,*)                                                           &
        '      Spectrum       Spectrum       Spectrum       Spectrum'
      Write (nout,*)                                                           &
        '      estimate       estimate       estimate       estimate'
      Write (nout,99996)(i,xg(i),i=1,ng)
      Write (nout,*)

100   Continue

99999 Format (1X,A,I0)
99998 Format (1X,A,F4.1,A,F7.4)
99997 Format (1X,A,F7.4,A,F7.4)
99996 Format (1X,I4,F10.4,I5,F10.4,I5,F10.4,I5,F10.4)
    End Program g13cbfe