docs: def pysal_Geary(self, **kwargs):
          """
          Compute Geary’s C for GeoRaster
  
          Usage:
          geo.pysal_C(permutations = 1000, rook=True)
  
          arguments passed to raster_weights() and pysal.Geary
          See help(gr.raster_weights), help(pysal.Geary) for options
          """
          if self.weights is None:
              self.raster_weights(**kwargs)
          rasterf = self.raster.flatten()
          rasterf = rasterf[rasterf.mask==False]
          self.Geary = pysal.Geary(rasterf, self.weights, **kwargs)