Program g02bffe

!     G02BFF Example Program Text

!     Mark 29.2 Release. NAG Copyright 2023.

!     .. Use Statements ..
      Use nag_library, Only: g02bff, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Integer                          :: i, ifail, ldcnt, ldrz, ldsspz, ldx,  &
                                          m, n, ncases
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: cnt(:,:), rz(:,:), sspz(:,:),        &
                                          std(:), x(:,:), xbar(:), xmiss(:)
      Integer, Allocatable             :: miss(:)
!     .. Executable Statements ..
      Write (nout,*) 'G02BFF Example Program Results'
      Write (nout,*)

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

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

      ldcnt = m
      ldrz = m
      ldsspz = m
      ldx = n
      Allocate (cnt(ldcnt,m),rz(ldrz,m),sspz(ldsspz,m),std(m),x(ldx,m),        &
        xbar(m),xmiss(m),miss(m))

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

!     Read in missing value flags
      Read (nin,*) miss(1:m)
      Read (nin,*) xmiss(1:m)

!     Display data
      Write (nout,99999) 'Number of variables (columns) =', m
      Write (nout,99999) 'Number of cases     (rows)    =', n
      Write (nout,*)
      Write (nout,*) 'Data matrix is:-'
      Write (nout,*)
      Write (nout,99998)(i,i=1,m)
      Write (nout,99997)(i,x(i,1:m),i=1,n)
      Write (nout,*)

!     Calculate summary statistics
      ifail = 0
      Call g02bff(n,m,x,ldx,miss,xmiss,xbar,std,sspz,ldsspz,rz,ldrz,ncases,    &
        cnt,ldcnt,ifail)

!     Display results
      Write (nout,*) 'Variable   Mean    St. dev.'
      Write (nout,99996)(i,xbar(i),std(i),i=1,m)
      Write (nout,*)
      Write (nout,*) 'Sums of squares and cross-products about' // ' zero'
      Write (nout,99998)(i,i=1,m)
      Write (nout,99997)(i,sspz(i,1:m),i=1,m)
      Write (nout,*)
      Write (nout,*) 'Correlation-like coefficients'
      Write (nout,99998)(i,i=1,m)
      Write (nout,99997)(i,rz(i,1:m),i=1,m)
      Write (nout,*)
      Write (nout,99999)                                                       &
        'Minimum number of cases used for any pair of variables: ', ncases
      Write (nout,*)
      Write (nout,*) 'Numbers used for each pair are:'
      Write (nout,99998)(i,i=1,m)
      Write (nout,99997)(i,cnt(i,1:m),i=1,m)

99999 Format (1X,A,I5)
99998 Format (1X,6I12)
99997 Format (1X,I3,3F12.4)
99996 Format (1X,I5,2F11.4)
    End Program g02bffe