Standard Library function that generates a uniform grid from irregularly-spaced data.
The vector containing the x-coordinates of the irregularly-spaced input data.
ytmp The vector containing the y-coordinates of the irregularly-spaced input data.
ztmp The vector containing the z-coordinates of the irregularly-spaced input data.
The number of neighboring data points to be used in the gridding algorithm. Must be in the range of {3 ... 25}. (Default: 3)
Nx The number of columns in the resulting array. Must be 
200.
UNIX and OpenVMS Users: PV-WAVE:GTGRID is an optional software package for advanced gridding. It gives you additional interpolation and extrapolation power by providing access to a library of gridding routines provided by Geophysical Techniques, Inc. For information on PV-WAVE:GTGRID, contact your Visual Numerics account representative.
