RELEASE NOTES spatstat 1.14-3 26 September 2008 We thank Mohammed Ghorbani for suggestions. OVERVIEW New functionality for quadrat methods, including resampling of quadrats. NEW FUNCTIONS quadratresample Resamples a point pattern by dividing the window into rectangular quadrats and randomly resampling the quadrats. quadrats Divides a given region into quadrats and returns the quadrats as a tessellation. as.owin.psp Method for "as.owin" for objects of class "psp". IMPROVEMENTS/ENHANCEMENTS shift.ppp shift.owin shift.im shift.psp These functions have a new argument 'origin' with options "centroid", "midpoint" and "bottomleft" indicating that the specified geometric location will be shifted to (0,0). For example, origin="cen" specifies that the centroid of the window will be shifted to (0,0). tiles When the tessellation X is a rectangular grid, the entries of tiles(X) are now in a different order and have been renamed. They are now ordered left-to-right in rows from top-to-bottom. cut.ppp When Y is a rectangular grid tessellation, the levels of the marks of cut(X,Y) are now ordered differently (to conform with tiles()) BUGS [1] split.ppp On *some* computer systems, split(X,Y) gave strange results when Y was a rectangular grid tessellation. This was a quirk of the lexicographical ordering of factor levels. Fixed.