```    Program e01sgfe

!     E01SGF Example Program Text

!     Mark 26.1 Release. NAG Copyright 2017.

!     .. Use Statements ..
Use nag_library, Only: e01sgf, e01shf, nag_wp
!     .. Implicit None Statement ..
Implicit None
!     .. Parameters ..
Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
Integer                          :: i, ifail, liq, lrq, m, n, nq, nw
!     .. Local Arrays ..
Real (Kind=nag_wp), Allocatable  :: f(:), q(:), qx(:), qy(:), rq(:),     &
u(:), v(:), x(:), y(:)
Integer, Allocatable             :: iq(:)
!     .. Executable Statements ..
Write (nout,*) 'E01SGF Example Program Results'

!     Skip heading in data file

!     Input the number of data points

liq = 2*m + 1
lrq = 6*m + 5
Allocate (x(m),y(m),f(m),iq(liq),rq(lrq))

Do i = 1, m
End Do

!     Generate the interpolant.

nq = 0
nw = 0

ifail = 0
Call e01sgf(m,x,y,f,nw,nq,iq,liq,rq,lrq,ifail)

!     Input the number of evaluation points.

Allocate (u(n),v(n),q(n),qx(n),qy(n))

Do i = 1, n
End Do

!     Evaluate the interpolant using E01SHF.

ifail = 0
Call e01shf(m,x,y,f,iq,liq,rq,lrq,n,u,v,q,qx,qy,ifail)

Write (nout,*)
Write (nout,*) '     I      U(I)      V(I)      Q(I)'

Do i = 1, n
Write (nout,99999) i, u(i), v(i), q(i)
End Do

99999 Format (1X,I6,3F10.2)
End Program e01sgfe
```