Reference

All functions
bes_g_cushman()	Configurational entropy for surfaces
bes_g_gao()	Boltzmann entropy of a landscape gradient
bes_m_cushman()	Configurational entropy for landscape mosaics
bes_m_zhao()	Zhao's entropy for landscape mosaics
bes_p_cushman()	Configurational entropy for point patterns
get_distance()	Calculates an average distance between non-NA cells
get_slope()	Calculate a slope
get_total_edge()	Calculate total edge based on the input matrix
permute_raster()	Permute values in the input raster