Program g01aefe

!     G01AEF Example Program Text

!     Mark 29.3 Release. NAG Copyright 2023.

!     .. Use Statements ..
      Use nag_library, Only: g01aef, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: xmax, xmin
      Integer                          :: iclass, ifail, j, k, n
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: cb(:), x(:)
      Integer, Allocatable             :: ifreq(:)
!     .. Executable Statements ..
      Write (nout,*) 'G01AEF Example Program Results'
      Write (nout,*)

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

!     Read in the problem size
      Read (nin,*) n, iclass, k

      Allocate (x(n),cb(k),ifreq(k))

!     Read in data
      Read (nin,*) x(1:n)

      Write (nout,99997) 'Number of cases', n
      Write (nout,99997) 'Number of classes', k

!     Get the class boundaries
      If (iclass/=1) Then
        Write (nout,*) 'Routine-supplied class boundaries'
      Else
        Read (nin,*) cb(1:(k-1))
        Write (nout,*) 'User-supplied class boundaries'
      End If
      Write (nout,*)

!     Construct the frequency table
      ifail = 0
      Call g01aef(n,k,x,iclass,cb,ifreq,xmin,xmax,ifail)

!     Display results
      Write (nout,*) '*** Frequency  distribution ***'
      Write (nout,*)
      Write (nout,*) '       Class            Frequency'
      Write (nout,*)
      Write (nout,99999) '   Up to    ', cb(1), ifreq(1)
      k = k - 1
      If (k>1) Then
        Write (nout,99998)(cb(j-1),' to ',cb(j),ifreq(j),j=2,k)
      End If
      Write (nout,99996) cb(k), '    and over  ', ifreq(k+1)
      Write (nout,*)
      Write (nout,99995) 'Total frequency = ', n
      Write (nout,99994) 'Minimum = ', xmin
      Write (nout,99994) 'Maximum = ', xmax

99999 Format (1X,A,F8.2,I11)
99998 Format (1X,F8.2,A,F8.2,I11)
99997 Format (1X,A,I4)
99996 Format (1X,F8.2,A,I9)
99995 Format (1X,A,I6)
99994 Format (1X,A,F9.2)
    End Program g01aefe