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SHGrid

Subclasses
`DHRealGrid`	Class for real Driscoll and Healy (1994) sampled grids.
`DHComplexGrid`	Class for complex Driscoll and Healy (1994) sampled grids.
`GLQRealGrid`	Class for real Gauss-Legendre quadrature sampled grids.
`GLQComplexGrid`	Class for complex Gauss-Legendre quadrature sampled grids.
Initialization
`x = SHGrid.from_array()`	Initialize using an array.
`x = SHGrid.from_file()`	Initialize using an array from a file.
Class attributes
`data`	Array of the gridded data.
`nlat, nlon`	The number of latitude and longitude bands in the grid.
`lmax`	The maximum spherical harmonic degree that can be resolved by the grid sampling.
`sampling`	For Driscoll and Healy grids, the longitudinal sampling of the grid. Either `nlong = nlat` or `nlong = 2 * nlat`.
`kind`	Either `'complex'` or `'real'` for the data type.
`grid`	Either `'DH'` or `'GLQ'` for Driscoll and Healy grids or Gauss-Legendre Quadrature grids.
`zeros`	The cos(colatitude) nodes used with Gauss-Legendre Quadrature grids. Default is `None`.
`weights`	The latitudinal weights used with Gauss-Legendre Quadrature grids. Default is `None`.
Class methods
`to_file()`	Save raw gridded data to a text or binary file.
`to_array()`	Return a numpy array of the gridded data.
`lats()`	Return a vector containing the latitudes of each row of the gridded data.
`lons()`	Return a vector containing the longitudes of each column of the gridded data.
`expand()`	Expand the grid into spherical harmonics.
`copy()`	Return a copy of the class instance.
`plot()`	Plot the raw data using a simple cylindrical projection.
`plot3d()`	Plot the raw data on a 3d sphere.
`info()`	Print a summary of the data stored in the SHGrid instance.

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