RELEASE NOTES 

		spatstat 1.11-3

		19 March 2007
	
OVERVIEW

	Urgent bug fixes.
	Several improvements and new functions.
	Overall performance accelerated slightly.

NEW FUNCTION

	interp.im 
		Spatial interpolation of the pixel values in an image.
		
	
IMPROVEMENTS/ENHANCEMENTS

	Overall performance has been accelerated slightly.

	[.im
	[<-.im
		If X is a pixel image, then X[V] and X[V] <- Y
		are now defined if V is 
			- a list with components x,y
			- a two-column matrix
			- anything else acceptable to as.ppp
		in addition to the already-available cases
		(when V is an owin, ppp, or logical-valued image).

	owin
		Accelerated.
		owin can now cope with polygonal windows with
		very large numbers of vertices and components.
		It has been tested on a window comprising 600 polygons, 
		one of which had 120,000 vertices.
		
		Rectangles of zero area are now permitted.

	ks.test.ppm
		Values of the covariate are now spatially interpolated, 
		which largely eliminates tied values
		(data items with equal value) 
		in the Kolmogorov-Smirnov test.

	superimpose
		New argument 'W' to specify the window.
		The default window is now the union of the windows
		of all the arguments (rather than the window of the
		first argument).

	clickppp
		More robust against problems occurring when the user
		clicks a point outside the specified window.

	intersection.owin
	union.owin
		It is now guaranteed that union.owin(A,A) returns A
		and similarly intersection(A,A) returns A.

	rmhmodel 
		Help files improved.

BUGS

	[1] ppp
		Crashed (depending on data) if the given x,y points
		lay outside the given window.
		Fixed.

	[2] rmh 
		rmh.ppm and rmhmodel.ppm crashed with Geyer models.
		Fixed.

	[3] ripras, convexhull.xy, bounding.box.xy
		Crashed when the convex hull had fewer than 3 vertices.
		Fixed (they now return NULL)

	[4] diagnose.ppm
		Crashed when (which="sum") was selected. 
		Fixed.

	[5] Kinhom
		Crashed in small datasets (depending on data).
		Fixed.