RELEASE NOTES 

		spatstat 1.6-4

		20 April 2005


OVERVIEW

	Several `traditional' techniques in spatial statistics
	have been implemented, by popular request.

NEW FUNCTIONS

	envelope
		Computes the simulation envelope of a summary statistic
		(such as the K function) under CSR or under a fitted model

	quadratcount
		Counts number of points in each quadrat in a grid

	pcf.ppp
		Estimation of pair correlation function by the
		kernel smoothing method, exactly as recommended
		in Stoyan & Stoyan 1994 page 285.
		
IMPROVEMENTS/ENHANCEMENTS

	1. The pair correlation function (pcf) has become a 
	generic function with methods for "ppp" (point patterns), 
	"fv" (function value tables) and "fasp" (function arrays). 

	2. There are some internal improvements to the model-fitting
	infrastructure.

COMPATIBILITY

	pcf(X, ...), where X is a point pattern,
	now has different arguments (see pcf.ppp)
	
BUGS

	None.
	(or at least, none repaired..)