Re: [R] memory problems when combining randomForests

From: Eleni Rapsomaniki <e.rapsomaniki_at_mail.cryst.bbk.ac.uk>
Date: Mon 31 Jul 2006 - 19:56:12 EST

Hello

I've just realised attachments are not allowed, so the data for the example in my previous message is:

pos.df=read.table("http://www.savefile.com/projects3.php?fid=6240314&pid=847249&key=119090", header=T)

neg.df=read.table("http://fs07.savefile.com/download.php?pid=847249&fid=9829834&key=362779"", header=T)

And my last two questions (promise!):
The first is related to the order of columns (ie. explanatory variables). I get different order of importance for my variables depending on their order in the training data. Is there a parameter I could fiddle with (e.g. ntree) to get a more stable importance order?

And finally, since interactions are not implemented, is there another method I could use in R to find dependencies among categorical variables? (lm doesn't accept categorical variables).

Many thanks
Eleni Rapsomaniki
Birkbeck College, UK



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