SUBROUTINE VPOLAGR (FF, zz, zi, z, na, nplus1)

ARGUMENTS

OUT

FF(NA)        output function                             real

IN

ZZ            coordinate of desired result                real
ZI(NA,NPLUS1) input field                                 real
Z(NPLUS1)     vertical coordinate                         real
NA            horizontal dimension of FF and ZI           integer
NPLUS1        maximum degree of Lagrange polynomial + 1   integer
  (1,NPLUS1)  (NA,NPLUS1)      ^
   +-------------+             |Z(NPLUS1)
   |             |             |Z(NPLUS1-1)
   |             |  array ZI   |
   +-----FF------+            -+ZZ    height 
   |             |             |
   |             |             |Z(2)
   +-------------+             |Z(1)
  (1,1)       (NA,1)

DESCRIPTION

EXAMPLE