Program g02qffe

!     G02QFF Example Program Text

!     Mark 28.3 Release. NAG Copyright 2022.

!     .. Use Statements ..
      Use nag_library, Only: g02qff, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: df
      Integer                          :: i, ifail, j, l, m, n, ntau
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: b(:,:), bl(:,:), bu(:,:), tau(:),    &
                                          x(:,:), y(:)
      Integer, Allocatable             :: info(:)
!     .. Executable Statements ..
      Write (nout,*) 'G02QFF Example Program Results'
      Write (nout,*)

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

!     Read in the problem size
      Read (nin,*) n, m, ntau

!     Read in the data
      Allocate (y(n),tau(ntau),x(n,m))
      Read (nin,*)(x(i,1:m),y(i),i=1,n)

!     Read in the quantiles required
      Read (nin,*) tau(1:ntau)

!     Allocate memory for output arrays
      Allocate (b(m,ntau),info(ntau),bl(m,ntau),bu(m,ntau))

!     Call the model fitting routine
      ifail = -1
      Call g02qff(n,m,x,y,ntau,tau,df,b,bl,bu,info,ifail)
      If (ifail/=0) Then
        If (ifail==111) Then
          Write (nout,*) 'Additional error information (INFO): ', info(1:ntau)
        Else
          Go To 100
        End If
      End If

!     Display the parameter estimates
      Do l = 1, ntau
        Write (nout,99999) 'Quantile: ', tau(l)
        Write (nout,*)
        Write (nout,*) '        Lower   Parameter   Upper'
        Write (nout,*) '        Limit   Estimate    Limit'
        Do j = 1, m
          Write (nout,99998) j, bl(j,l), b(j,l), bu(j,l)
        End Do
        Write (nout,*)
        Write (nout,*)
      End Do

100   Continue

99999 Format (1X,A,F6.3)
99998 Format (1X,I3,3(3X,F7.3))
    End Program g02qffe