RELEASE NOTES 

		spatstat 1.8-8

	 	28 March 2006


OVERVIEW

	Various minor improvements.
	Format of `copper' dataset has changed.

CHANGED DATASETS

	data(copper)
		The format of this dataset has been improved.
		The lineament patterns (copper$lines and copper$SouthLines) 
		are now supplied as "psp" objects.
		The function copper$SouthDistance is now deprecated;
		use distmap() instead.

	data(residualspaper)
		The code to produce Figures 2, 11, 12 and 20
		has been updated to reflect the changed format of 
		the `copper' dataset.

NEW FUNCTIONS

	hist.im
		Plots a histogram of pixel values in an image.

	mean.im
		Calculates mean of pixel values in an image


IMPROVEMENTS/ENHANCEMENTS

	Kdot.inhom
	Kcross.inhom
	Kmulti.inhom
		The arguments lambdaI, lambdaJ, lambdadot
		can now be pixel images instead of vectors.
		This allows much easier simulation in envelope().

	envelope
		envelope() has a new argument `clipdata'. 
		If clipdata=TRUE the data point pattern will be clipped to the
		window containing the simulated point patterns. 
		This makes it much simpler to generate envelopes
		based on random shifts, using rshift(... edge="erode"). 
		See help(envelope). 

	affine.owin
	rotate.owin
		These functions now recognise when the transformed window
		is a rectangle, and return a rectangle instead of a polygon.
		
	rmh.default
		The `info' attribute of the return value 
		now carries more detailed information.

	qqplot.ppm
		Now refuses to simulate a model that is invalid
		(instead of attempting to project it).

	unique.ppp
	duplicated.ppp
		These functions have been accelerated by a factor of 6
		using a new algorithm.

	multiplicity.ppp
		Slightly accelerated.

BUGS

	[1] summary.ppm
		summary.ppm and print.summary.ppm did not correctly report
		whether a model was fitted by maximum pseudolikelihood
		or by the Huang-Ogata approximate likelihood method.
		Fixed.


	[2] rtoro
		In version 1.8-7 the function rtoro was meant to be
		superseded by rshift().
		However the older version of rtoro and its help file
		were accidentally retained in 1.8-7.
		They have now been expunged, and calling rtoro
		will give a message that rtoro is deprecated.