RELEASE NOTES 

		spatstat 1.8-7

	 	2 March 2006


OVERVIEW

	Fixed bugs that caused the package to run slowly.

	New functions for random shifts and random lines.

NEW FUNCTIONS

	rshift
	rshift.ppp
	rshift.psp
		New function for performing a random shift
		of a point pattern or line segment pattern.
		This supersedes 'rtoro' and has a lot more options.
		
	append.psp
		combines two line segment patterns

	rpoisline
		Poisson random line process

SUPERSEDED FUNCTIONS

	rtoro 
		replaced by rshift.
		rtoro is now Deprecated.

IMPROVEMENTS/ENHANCEMENTS

	qqplot.ppm
		Added arguments 'limcol' and 'monochrome'
		to qqplot.ppm and plot.qqppm to enable
		black-and-white plots.
		Performance accelerated.

	envelope
		Performance accelerated.
		Minor improvement in default plot behaviour.

	diagnose.ppp
		Performance accelerated.
		Minor improvement in argument handling

	summary.ppp
	summary.quad
		Extra argument 'checkdup' to enable/disable
		checking for duplicated points.

	demo(spatstat)
	demo(diagnose)
		The demonstrations now run faster.

BUGS

	[1] DELAYS
		Many functions in spatstat 1.8-6 ran slowly
		because of a problem with summary.ppp.
		Fixed.

	[2] print.ppm
		Printing a fitted point process model
		was taking an incredibly long time.
		Fixed.

	[3] summary.quad
		This took a very long time.
		Fixed.

	[4] plot.psp
		crashed if the pattern was empty.
		Fixed.

	[5] "[.psp"
		crashed if the result was empty 
		and in some other cases.
		Fixed.

	[6] split<-.ppp
		A very subtle bug caused the value of `un'
		to be ignored sometimes. Fixed.

	[7] density.psp
		Did not clip the density to the original window
		if it was not a rectangle.
		Fixed.