area.graph.statistics   Statistics for edges (lines) based on a defined
                        scale (area).
build.node.data         Build node data
dmatrix.df              Distance matrix to data.frame
dps                     dps genetic distance matrix for Columbia
                        spotted frog (Rana luteiventris)
graph.statistics        Point sample and statistics for edges (lines)
gravity                 Gravity model
knn.graph               Saturated or K Nearest Neighbour Graph
plot.gravity            Plot gravity model
predict.gravity         Predict gravity model
print.gravity           Print gravity model
ralu.model              Columbia spotted frog (Rana luteiventris) data
                        for specifying gravity model. Note, the
                        data.frame is already log transformed.
ralu.site               Subset of site-level spatial point data for
                        Columbia spotted frog (Rana luteiventris)
rasters                 Subset of raster data for Columbia spotted frog
                        (Rana luteiventris)
summary.gravity         Summarizing Gravity Model Fits
