Program g08affe

!     G08AFF Example Program Text

!     Mark 27.3 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: g08aff, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: h, p
      Integer                          :: i, ifail, k, lx, nhi, nlo
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: w(:), x(:)
      Integer, Allocatable             :: l(:)
!     .. Intrinsic Procedures ..
      Intrinsic                        :: sum
!     .. Executable Statements ..
      Write (nout,*) 'G08AFF Example Program Results'
      Write (nout,*)

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

!     Read in problem size
      Read (nin,*) k

      Allocate (l(k))

!     Read in number of observations in each sample
      Read (nin,*) l(1:k)

!     Calculate total number of observations
      lx = sum(l(1:k))

      Allocate (x(lx),w(lx))

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

!     Display title
      Write (nout,*) 'Kruskal-Wallis test'
      Write (nout,*)

!     Display input data
      Write (nout,*) 'Data values'
      Write (nout,*)
      Write (nout,*) '  Group    Observations'
      nlo = 1
      Do i = 1, k
        nhi = nlo + l(i) - 1
        Write (nout,99999) i, x(nlo:nhi)
        nlo = nlo + l(i)
      End Do

!     Perform ANOVA
      ifail = 0
      Call g08aff(x,lx,l,k,w,h,p,ifail)

!     Display results
      Write (nout,*)
      Write (nout,99998) 'Test statistic       ', h
      Write (nout,99997) 'Degrees of freedom   ', k - 1
      Write (nout,99998) 'Significance         ', p

99999 Format (1X,I5,5X,10F4.0)
99998 Format (1X,A,F9.3)
99997 Format (1X,A,I9)
    End Program g08affe