Gridding Routines
FAST_GRID2 (points, grid_x)
Returns a gridded, 1D array containing Y values, given random X,Y coordinates (this function works best with dense data points).
FAST_GRID3 (points, grid_x, grid_y)
Returns a gridded, 2D array containing Z values, given random X, Y, Z coordinates (this function works best with dense data points).
FAST_GRID4 (points, grid_x, grid_y, grid_z)
Returns a gridded, 3D array containing intensity values, given random 4D coordinates (this function works best with dense data points).
Returns a gridded, 1D array containing Y values, given random X,Y coordinates (this function works best with sparse data points).
GRID_3D (points, grid_x, grid_y)
Returns a gridded, 2D array containing Z values, given random X, Y, Z coordinates (this function works best with sparse data points).
GRID_4D (points, grid_x, grid_y, grid_z)
Returns a gridded, 3D array containing intensity values, given random 4D coordinates (this function works best with sparse data points).
Grids n dimensional data.
GRID_SPHERE (points, grid_x, grid_y)
Returns a gridded, 2D array containing radii, given random longitude, latitude, and radius values.
Interpolates scattered data at scattered locations.
