man c_dspnt2s (3): Interpolate at a single point (or points) in 2D in single precision

FUNCTION PROTOTYPE

void c_dspnt2s(int, float [], float [], float [],


               int, float [], float [], float *, int *);

void c_dspnt2s (int n, float x[], float y[], float z[],
int m, float xo[], float yo[], float zo, int *ier);

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 float. Space for m floats is allocated for zo by dspnt2s. 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.

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

To use c_dspnt2s, load the NCAR Graphics library ngmath.

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