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Myriam Saavedra M. Sc. Questions about maximun radius distance
2 messages · Myriam, Ben Bolker
Myriam <fantasmita1948 <at> yahoo.fr> writes:
Dear Mr. Baddeley ? I just graduated from a Masters in Applied?Mathematics?on Jun19th. My thesis was about spatial distribution /a nalysis of some?trees in a part of? the Congo Basic Forest. In my thesis I used your spatial package in R, and today I'm doing a?more deeper study about how we choise the r distance in Function F().?I would like to be able?to understand about value of rmaxdefault as:
"Mr Baddeley" isn't here (probably) -- this is a generic help list for questions on R.
ripley <- min(diff(W$xrange), diff(W$yrange))/4 rlarge <- if (!missing(lambda)) sqrt(1000/(pi * lambda)) else Inf rmax <- min(rlarge, ripley)
?For the ripley's?calculation, I found your explanation in the?internet but for?the rlarge I?couldn't find it. Could you?explain?why it?is using?the value?inside of the?sqrt (1000/(pi * lambda)).
You've given us just a fragment of a question here -- there's not enough context to work with. We don't know where the variable 'W' came from, although presumably from a Ripley's K calculation ... ? Please read http://tinyurl.com/reproducible-000 , and give us more information (e.g. the link (URL) to the explanation you say you found on the internet). I would also suggest that this question might be better suited for the r-sig-ecology at r-project.org mailing list ...