[FORGED] Re: density from spatstat less than zero

Thank you Rolf. The sub-zero density values are indeed extremely tiny in
absolute value. I will try to upgrade my R and spatstat (institutional
computer . . . ) and try again.

Just realised:  You can (of course!) work around the problem, without 
upgrading, via:

ddd <- eval.im(pmax(ddd,0))

Note that you need --- for reasons that are a wee bit too complicated to 
go into --- to call eval.im() explicitly in the foregoing.  I.e. you 
*cannot* just do "ddd <- pmax(ddd,0)".

That being said, it would still be a good idea to upgrade --- if you can 
persuade the IT weevils at your institution to cooperate.

cheers,

Rolf

Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276