RELEASE NOTES 

		spatstat 1.12-4

		18 December 2007
	
OVERVIEW
	Minor extensions, safety improvements, and bug fixes.

IMPROVEMENTS/ENHANCEMENTS

	ppp
		Now checks for duplicated points,
		and issues a warning if any are found.

	envelope
		When constructing simultaneous critical envelopes,
		if the theoretical (null) value of the summary statistic 
		must be estimated by simulation, envelope() now does this
		using a separate set of 'nsim2' simulations.
		This is required so that the test is strictly correct
		(i.e. so that its significance level is exact).
		
	plot.splitppp
	plot.listof
		These functions now have an argument 'mar.panel'
		to control spacing around the individual plot panels.

	superimpose
		Now accepts NULL arguments and interprets them as 
		empty point patterns.

	nndist, pairdist
		The return values are no longer invisible.
		This was too confusing for many first-time users.

	rpoispp
		Performs more checking of the arguments, to avoid
		some common mistakes.

	applynbd
		For a marked point pattern, applynbd() now passes the
		mark of the current point, as well as its coordinates,
		to the user-supplied function 'fun'.

	help(plot.im)
		Help file improved.

BUGS

	[1] eval.im, density.im
		These functions ignored the `unitname' of the input data
		and returned an image with unnamed units of length.
		Fixed.
		
	[2] as.im
		If f was a factor-valued function, 
		as.im(f,W) was not a factor-valued image. 
		Fixed.

	[3] summary.ppp, duplicated.ppp
		Stopped with the message
			 "Error in result[sub] <- duplicated(yy[sub]) :
			  NAs are not allowed in subscripted assignments"
		when x was a multitype point pattern where some of the
		possible types were absent in the pattern
		i.e. when unique(marks(x)) != levels(marks(x)).
		Fixed.

	[4] data(longleaf)
		unitname(longleaf) was incorrectly given as feet.
		The correct units are metres.
		(The help file was correct.)
		Fixed.

	[5] print.summary.owin
		Minor bugs fixed.