Voronoi diagrams represent a way to visualise spatial data. A voronoi diagram consists of a set of polygons of which the points in each polygon are closest to a set of pre-defined points. Therefore, voronoi diagrams can be used to analyse point density.
In this guide the subject of voronoi diagrams is documented by way of examples and the corresponding R code. The data to reproduce the examples is available on my github repo.
Download and read the full document : voronoi_diagrams_with_R