Program g02ldfe

!     G02LDF Example Program Text

!     Mark 27.3 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: g02ldf, nag_wp, x04caf
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Integer                          :: i, ifail, ip, iscale, ldb, ldyhat,   &
                                          ldz, my, mz, n, orig
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: b(:,:), xbar(:), xstd(:), ybar(:),   &
                                          yhat(:,:), ystd(:), z(:,:)
      Integer, Allocatable             :: isz(:)
!     .. Intrinsic Procedures ..
      Intrinsic                        :: sum
!     .. Executable Statements ..
      Write (nout,*) 'G02LDF Example Program Results'
      Write (nout,*)
      Flush (nout)

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

!     Read in problem size
      Read (nin,*) my, orig, iscale, n, mz

      ldyhat = n
      ldz = n
      Allocate (ybar(my),ystd(my),isz(mz),z(ldz,mz),yhat(ldyhat,my))

!     Read prediction x-data
      Read (nin,*)(z(i,1:mz),i=1,n)

!     Read in elements of ISZ
      Read (nin,*) isz(1:mz)

!     Calculate IP
      ip = sum(isz(1:mz))

      ldb = ip
      If (orig==1) Then
        ldb = ldb + 1
      End If
      Allocate (xbar(ip),xstd(ip),b(ldb,my))

!     Read parameter estimates
      Read (nin,*)(b(i,1:my),i=1,ldb)

!     Read means
      If (orig==-1) Then
        Read (nin,*) xbar(1:ip)
        Read (nin,*) ybar(1:my)

        If (iscale/=-1) Then
!         Read scalings
          Read (nin,*) xstd(1:ip)
          Read (nin,*) ystd(1:my)
        End If
      End If

!     Calculate predictions
      ifail = 0
      Call g02ldf(ip,my,orig,xbar,ybar,iscale,xstd,ystd,b,ldb,n,mz,isz,z,ldz,  &
        yhat,ldyhat,ifail)

!     Display results
      ifail = 0
      Call x04caf('General',' ',n,my,yhat,ldyhat,'YHAT',ifail)

    End Program g02ldfe