ncl_c_dspnt2d man page

c_dspnt2d — Interpolate at a single point (or points) in 2D in single precision

Function Prototype

void c_dspnt2d(int, double [], double [], double [],
               int, double [], double [], double *, int *);

Synopsis

void c_dspnt2d (int n, double x[], double y[], double z[], 
                int m, double xo[], double yo[], double zo, int *ier);    

Description

n

The number of input data points.

x

An array containing the X coordinates of the input data points.

y

An array containing the Y coordinates of the input data points.

z

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 0 <= l < n .

m

The number of output data points (this may be "1").

xo

An array of dimension m containing the X coordinates of the  output data. The values in xo may be in any order.

yo

An array of dimension m containing the Y coordinates of the  output data. The values in xo may be in any order.

zo

A pointer to a double. Space for m doubles is allocated for zo by  dspnt2d. zo[i] is the interpolated value at point (xo[i],yo[i])  for 0 <= i < n .

ier

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.

Usage

This function is called when you want to interpolate 2D data at an individual point or points.

Access

To use c_dspnt2d, 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

Info

September 1997-1998 UNIX NCAR GRAPHICS