Provided by: libncarg-dev_6.3.0-6build1_amd64

**NAME**

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

**COPYRIGHT**

Copyright (C) 2000 University Corporation for Atmospheric Research The use of this Software is governed by a License Agreement.