RELEASE NOTES 

		spatstat 1.18-0

		10 march 2010

We thank Ege Rubak and Tyler Dean Rudolph for suggestions.
	
OVERVIEW
	A point pattern X can now have several mark variables:
	marks(X) can be a data frame.
	Extended capabilities for 'envelope' and 'kstest'.
	New functions for pixellating line segments.
	
NEW FUNCTIONS

	as.mask.psp
		Convert a line segment pattern to a binary pixel mask.

	pixellate.psp
		Convert a line segment pattern to a pixel image
		by measuring the length of line in each pixel

	as.data.frame.im
		Convert a pixel image to a data frame (x,y,value)

IMPROVEMENTS/ENHANCEMENTS

	envelope
		This function is now generic, 
		with methods for "ppp", "ppm" and "kppm".

	kstest.ppp
		Now handles multitype point patterns

	kstest.ppm
		Now handles multitype point process models

	nnclean.ppp
		Now returns a point pattern with a data frame of marks.
		
	print.ppp, plot.ppp, split.ppp
		Now handle point patterns with a data frame of marks.

	plot.ppp
		New argument 'which.marks' to select a column
		from a data frame of marks to be plotted.

	plot.ppp
		Improved handling of marks that are POSIX times.

	
	data(finpines)
	data(nbfires)
	data(shapley)
		The format of these datasets has changed.
		They are now point patterns with a data frame of marks.

	rpoisppOnLines
		Accelerated.

        complement.owin
		Now handles any object acceptable to as.owin.

BUGS

	[1] erosion, opening
	       Crashed if w was not a window.
	       Fixed.

        [2] diameter, eroded.areas
	       Crashed if w was not a window (contrary to help file).
	       Fixed.