Program g03dafe

!     G03DAF Example Program Text

!     Mark 27.3 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: g03daf, nag_wp, x04caf
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: df, sig, stat
      Integer                          :: i, ifail, ldgmn, ldx, lgc, lwk, lwt, &
                                          m, n, ng, nvar
      Character (1)                    :: weight
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: det(:), gc(:), gmn(:,:), wk(:),      &
                                          wt(:), x(:,:)
      Integer, Allocatable             :: ing(:), isx(:), iwk(:), nig(:)
!     .. Intrinsic Procedures ..
      Intrinsic                        :: count
!     .. Executable Statements ..
      Write (nout,*) 'G03DAF Example Program Results'
      Write (nout,*)
      Flush (nout)

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

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

      If (weight=='W' .Or. weight=='w') Then
        lwt = n
      Else
        lwt = 0
      End If
      ldx = n
      Allocate (x(ldx,m),ing(n),wt(lwt),isx(m))

!     Read in data
      If (lwt>0) Then
        Read (nin,*)(x(i,1:m),ing(i),wt(i),i=1,n)
      Else
        Read (nin,*)(x(i,1:m),ing(i),i=1,n)
      End If

!     Read in variable inclusion flags
      Read (nin,*) isx(1:m)

!     Calculate NVAR
      nvar = count(isx(1:m)==1)

      ldgmn = ng
      lgc = (ng+1)*nvar*(nvar+1)/2
      lwk = n*(nvar+1)
      Allocate (nig(ng),gmn(ldgmn,nvar),det(ng),gc(lgc),wk(lwk),iwk(ng))

!     Compute test statistic
      ifail = 0
      Call g03daf(weight,n,m,x,ldx,isx,nvar,ing,ng,wt,nig,gmn,ldgmn,det,gc,    &
        stat,df,sig,wk,iwk,ifail)

!     Display results
      ifail = 0
      Call x04caf('General',' ',ng,nvar,gmn,ldgmn,'Group means',ifail)
      Write (nout,*)
      Write (nout,*) ' LOG of determinants'
      Write (nout,*)
      Write (nout,99999) det(1:ng)
      Write (nout,*)
      Write (nout,99998) ' STAT = ', stat
      Write (nout,99998) '   DF = ', df
      Write (nout,99998) '  SIG = ', sig

99999 Format (1X,3F10.4)
99998 Format (1X,A,F7.4)
    End Program g03dafe