spatstat functions

• quadratcount(<ppp>, nx = , ny = ) to define subregions (nx columns, ny rows) and count events per subregion
• quadrat.test(<quadratcount>) for CSR hypothesis testing. Extra arguments:
  • alternative =: possible are "two-sided" (default), "clustered" and "regular"
  • method =: defaults to "Chisq"; "MonteCarlo" is also possible (CSR distribution by simulations)