[R] variable importance in random forest

the result returned by the randomForest function? or do I have to use the original Breiman code to get access to this measure? I am using randomForest package release 4.3 many thanks Murad Nayal __ R-help@stat.math.ethz.ch mailing list https

Re: [R] unavoidable loop? a better way??

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[Fwd: Re: [R] unavoidable loop? a better way??]

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Re: [R] 64-bit R on Intel Xeon EM64T running fine

/posting-guide.html -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia University 630 West 168th Street. New York, NY 10032 Tel: 212-305-6884 Fax: 212-305-6926 __ [EMAIL

[R] debugging non-visible functions

, newdata = list(), type = c(vector, prob, class, matrix), ...) { ... deleted code ... } environment: namespace:rpart debug(predict.rpart,pos=package:rpart) Error: Object predict.rpart not found how can I 'debug' non-visible functions, like predict.rpart? many thanks Murad Nayal

Re: [R] silhoutte.default bugs

Martin Maechler wrote: Murad == Murad Nayal [EMAIL PROTECTED] on Wed, 21 Jan 2004 15:19:28 -0500 writes: Murad This might have been fixed in later versions (I am Murad using R1.7.0), yes, the bug has been fixed long ago, from my ChangeLog (!), it was 2003-07-18. sorry

[R] silhoutte.default bugs

=minC))] s.i - (b.i - a.i)/pmax(b.i, a.i) wds[iC, sil_width] - s.i } attr(wds, Ordered) - FALSE attr(wds, call) - cll class(wds) - silhouette wds } -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons

[R] model-based clustering

in an automated, non interactive fashion. regards, Murad -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia University 630 West 168th Street. New York, NY 10032 Tel: 212-305-6884 Fax: 212-305-6926

Re: [R] model-based clustering

in an automated, non interactive fashion. regards, Murad -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia University 630 West 168th Street. New York, NY 10032 Tel: 212-305-6884 Fax: 212-305-6926

[R] SVM question

on the list might have had recent experience with these types of problems and can offer some comments about such an approach. many thanks -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia University 630 West 168th

[R] graphics reset

the graphics parameters to default values, say in these cases where you forgot to save the original values and want to restore the graphics to some sane state after a long R session. many thanks -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians

Re: [R] kmeans error (bug?)

out empty. It wasn't immediately clear how could further refinement result in clusters becoming empty. thanks for the feedback On Mon, 10 Nov 2003, Murad Nayal wrote: I have been getting the following intermittent error from kmeans: str(cavint.p.r) num [1:1967, 1:13] 0.691 0.123 0.388

[R] kmeans error (bug?)

Hello, I have been getting the following intermittent error from kmeans: str(cavint.p.r) num [1:1967, 1:13] 0.691 0.123 0.388 0.268 0.485 ... - attr(*, dimnames)=List of 2 ..$ : chr [1:1967] 6 49 87 102 ... ..$ : chr [1:13] HYD NEG POS OXY ... set.seed(34) kmeans(cavint.p.r,centers=34)

[R] clustering distributions

Hi, I have a dataset where each case is characterized by a histogram. I would like to cluster these cases using a sensible distance measure, possibly relative entropy? Is there a way I can use R facilities to do this (hclust etc.). I couldn't find an alternative to dist that would compute

[R] anova model refinement/clustering question

object and trick hclust into using it. I am somewhat of an amateur in the field (and R) and I am probably making that obvious. any guidance to the 'right' path to approach this (privately or on the list) is really appreciated. many thanks Murad -- Murad Nayal M.D. Ph.D. Department

[R] multiple character matching within a string

if I say that this has proven to be extremely slow (I am not sure exactly why though, is it because strsplit creates new list for every call?). Is there an alternative way to do this short of going to compiled code? many thanks, -- Murad Nayal M.D. Ph.D. Department of Biochemistry

[R] EMACS/ESS problems

for a workaround? both emacs/ess are relatively recent versions (installed a few months ago). I tried using ess-eval-buffer/region instead of cutting and pasting and the same thing happens for me. many thanks -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College

Re: [R] EMACS/ESS problems

(1,2,3) ess-eval-region returns with Finished evaluation. but the v vector is still not defined in R I am sure I am doing something silly. just can't figure out what? 2. [EMAIL PROTECTED] might be a better place to send this. thanks for the advice. I'll try that too. Murad Nayal [EMAIL

Re: [R] EMACS/ESS problems

in argument lists to functions). While I can expand on the reasons, for the moment I just want to suggest that you get into the habit of using the assignment arrow. Rich -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia

[R] lattice question

. is that possible? regards -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia University 630 West 168th Street. New York, NY 10032 Tel: 212-305-6884 Fax: 212-305-6926 __ [EMAIL

[R] help on barplot

to plot a 3D-histogram in R (a true 3D bar plot, without using image). many thanks Murad -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia University 630 West 168th Street. New York, NY 10032 Tel: 212-305-6884 Fax

Re: [R] Formal definitions of R-language.

/mailman/listinfo/r-help -- Murad Nayal M.D. Ph.D. Department of Biochemistry and Molecular Biophysics College of Physicians and Surgeons of Columbia University 630 West 168th Street. New York, NY 10032 Tel: 212-305-6884 Fax: 212-305-6926 __ [EMAIL

Re: [R] help on R programming.

thanks you all for the replies, it's been very helpful. regards Prof Brian Ripley wrote: On Mon, 23 Jun 2003, Murad Nayal wrote: - what is the correct way to -remove- a component from a list. this seems to do the trick: list[[1]] = NULL, however, you'd think this should simply

[R] help on R programming.

that will allow me to do this? - what is the correct way to -remove- a component from a list. this seems to do the trick: list[[1]] = NULL, however, you'd think this should simply attach a NULL object at the first component position? many thanks for any help -- Murad Nayal M.D. Ph.D. Department