CI                      Calculate the Convergence Index (CI) from a
                        slope raster
aspect                  Calculate topographic aspect from a DEM
carmel                  Digital Elevation Model of Mount Carmel
dem                     Small Digital Elevation Model
detrend                 Detrend a Digital Elevation Model
dist_to_nearest         Calculate raster of distances to nearest
                        feature
extract2                Extract raster values by lines or polygons
flowlength              Calculate flow length
focal2                  Apply a focal filter on a raster
focal2r                 Apply a focal filter on a raster (R)
footprints              Footprints
golan                   Digital Elevation Model of Golan Heights
landsat                 RGB image of Mount Carmel
layer_to_matrix         Get 'stars' layer values as matrix
layer_to_vector         Get 'stars' layer values as vector
make_grid               Make 'stars' grid from 'sf' layer
matrix_extend           Extend matrix
matrix_get_neighbors    Get neighboring cell values for given matrix
                        cell
matrix_to_stars         Convert 'matrix' to 'stars'
matrix_trim             Trim matrix
mode_value              Mode
normalize_2d            Normalize a 2D 'stars' object
normalize_3d            Normalize a 3D 'stars' object
rgb_to_greyscale        Convert RGB to greyscale
slope                   Calculate topographic slope from a DEM
trim2                   Remove empty outer rows and columns
w_azimuth               Create matrix with azimuths to center
w_circle                Create matrix with circular weight pattern
