Program g13bhfe

!     G13BHF Example Program Text

!     Mark 30.1 Release. NAG Copyright 2024.

!     .. Use Statements ..
      Use nag_library, Only: g13bhf, nag_wp, x04caf
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Integer                          :: i, ifail, iwa, kzef, ldparx, ldxxyn, &
                                          ncf, nfv, nis, npara, nparax, nser,  &
                                          nsttf
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: fsd(:), fva(:), para(:), parx(:,:),  &
                                          rmsxy(:), sttf(:), wa(:), xxyn(:,:)
      Integer                          :: mr(7)
      Integer, Allocatable             :: mrx(:,:), mt(:,:)
!     .. Intrinsic Procedures ..
      Intrinsic                        :: max
!     .. Executable Statements ..
      Write (nout,*) 'G13BHF Example Program Results'
      Write (nout,*)

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

!     Read in problem size
      Read (nin,*) nsttf, nser, nfv, kzef

!     Number of input series
      nis = nser - 1

!     Read in the orders
      Read (nin,*)(mr(i),i=1,7)

      Allocate (mt(4,nser))

!     Read in transfer function
      Do i = 1, nis
        Read (nin,*) mt(1:4,i)
      End Do

!     Calculate NPARA
      npara = 0
      Do i = 1, nis
        npara = npara + mt(2,i) + mt(3,i)
      End Do
      npara = npara + mr(1) + mr(3) + mr(4) + mr(6) + nser

      ldxxyn = nfv
      ldparx = npara
      Allocate (para(npara),sttf(nsttf),xxyn(ldxxyn,nser),mrx(7,nser),         &
        parx(ldparx,nser),rmsxy(nser),fva(nfv),fsd(nfv))

!     Read in rest of data
      Read (nin,*) sttf(1:nsttf)
      Read (nin,*) para(1:npara)
      Read (nin,*)(xxyn(i,1:nis),i=1,nfv)
      ncf = mr(1) + mr(3) + mr(4) + mr(6)
      Do i = 1, nis
        Read (nin,*) mrx(1:7,i)
        nparax = mrx(1,i) + mrx(3,i) + mrx(4,i) + mrx(6,i)
        ncf = max(ncf,nparax)
        Read (nin,*) parx(1:nparax,i)
      End Do
      Read (nin,*) rmsxy(1:nser)

      iwa = 0
      Allocate (wa(iwa))

!     Produce forecasts
      ifail = 0
      Call g13bhf(sttf,nsttf,mr,nser,mt,para,npara,nfv,xxyn,ldxxyn,mrx,parx,   &
        ldparx,rmsxy,kzef,fva,fsd,wa,iwa,ifail)

!     Display results
      Write (nout,*) 'The forecast values and their standard errors'
      Write (nout,*)
      Write (nout,*) '   I     FVA       FSD'
      Write (nout,*)
      Write (nout,99999)(i,fva(i),fsd(i),i=1,nfv)
      Write (nout,*)
      Flush (nout)
      ifail = 0
      Call x04caf('General',' ',nfv,nser,xxyn,ldxxyn,                          &
        'The values of z(t) and n(t)',ifail)
      Write (nout,99998) 'The first ', nis,                                    &
        ' columns hold the z(t) and the last column the n(t)'

99999 Format (1X,I4,2F10.4)
99998 Format (1X,A,I0,A)
    End Program g13bhfe