NAME

       DSPNT2S - Interpolate at a single point (or points) in 2D in single precision

SYNOPSIS

       CALL DSPNT2S (N, X, Y, Z, M, XO, YO, ZO, IER)

DESCRIPTION

       N           (Integer, Input) - The number of input data points.

       X           (Real,  Input)  -  An  array  containing  the  X coordinates of the input data
                   points.

       Y           (Real, Input) - An array containing  the  Y  coordinates  of  the  input  data
                   points.

       Z           (Real,  Input)  -  An array containing the functional values of the input data
                   points. That is, Z(L) is  the  value  of  the  input  function  at  coordinate
                   (X(L),Y(L)), for L=1,N.

       M           (Integer, Input) - The number of output data points (this may be "1").

       XO          (Real,  Input)  -  An array of dimension M containing the X coordinates of the
                   output data. The values in XO may be in any order.

       YO          (Real, Input) - An array of dimension M containing the Y  coordinates  of  the
                   output data. The values in YO may be in any order.

       ZO          (Real,  Output)  - An array of dimension M containing the interpolated values.
                   ZO(I) is the interpolated value at point (XO(I),YO(I)) for I=1,M.

       IER         (Integer, Output) - An error return value. If IER is returned as  0,  then  no
                   errors  were  detected.  If  IER  is  non-zero, then refer to the man page for
                   dsgrid_errors for details.

USAGE

       This subroutine is called when you want to interpolate at an individual point or points.

ACCESS

       To use DSPNT2S, load the NCAR Graphics library ngmath.

SEE ALSO

       dsgrid, dsgrid_params.

       Complete documentation for Dsgrid is available at URL
       http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html

COPYRIGHT

       Copyright (C) 2000
       University Corporation for Atmospheric Research

       The use of this Software is governed by a License Agreement.