similar to: debugging question

Hello everybody, I'm testing the randomForest package in order to do some simulations and I get some trouble with the prediction of new values. The random forest computation is fine but each time I try to predict values with the newly created object, I get an error message. I thought I was because NA values in the dataframe, but I cleaned them and still got the same error. What am I

Dear R-devel, Can anyone give me some hints on how to go about debugging a strange segfault in my randomForest package? Here's the scoop: A user reported segfault when running predict() in the randomForest package. I asked for the data and code. The combination runs fine under WinXPPro, but does give segfault on one of our Linux boxes running R (1.7.0 through R-devel_2004-01-08) on

A new version of the randomForest package is now available on CRAN. The DESCRIPTION is: Package: randomForest Title: Breiman's random forest for classification and regression Version: 3.4-1 Depends: R (>= 1.5.0) Author: Fortran original by Leo Breiman and Adele Cutler, R port by Andy Liaw and Matthew Wiener. Description: Classification and regression based on a forest of trees using

The link from http://cran.r-project.org/src/contrib/PACKAGES.html#randomForest seems to be broken. To get the file try http://cran.r-project.org/src/contrib/randomForest_3.3-4.tar.gz instead. > -----Original Message----- > From: Liaw, Andy [mailto:andy_liaw at merck.com] > Sent: Thursday, September 26, 2002 8:08 PM > To: 'r-announce at stat.math.ethz.ch' > Subject:

Dear R-devel, I'm encountering a strange problem in a Rd file that I'm working on. In the "Value" section, I have something like: ===================== \value{ An object of class \code{randomForest}, which is a list with the following components: \item{call}{the original call to \code{randomForest}} ... For classification problem, the following are also included:

Christian -- You don't provide enough information (like a call) to answer this. I suspect, though, that you may be subsetting in a way that passes randomForest no data. I'm not aware offhand of an easy way to get this error from randomForest. I tried creating some data superficially similar to yours to see whether something would break if there were only a single value in the variable

Dear R-devel, Inspired by Michael Li's talk at JSM, I decided to try rpvm and snow on our two linux boxes. It only took me a couple of hours of screwing around to get it working (sooner if I had RTFM). Our setup is: 2 dual PIII-866 Xeons, one with 2GB RDRAM, the other with 1.28GB RDRAM. The first machine is acting as the NIS/NFS server. both /usr and /home are exported to the second

I hope this question is adequate for this list I use the nnet code from V&R p. 348: The very nice and general function CVnn2() to choose the number of hidden units and the amount of weight decay by an inner cross-validation- with a slight modification to use it for classification (see below). My data has 2 classes with unequal size: 45 observations for classI and 116 obs. for classII With

(Apologies for cross-posting this job announcement to those on both R-help and S-news.) 2003 SUMMER INTERNSHIP POSITION Domestic United States residents / visitors only. Merck Research Laboratories Rahway, NJ, USA (approx. 30 miles from New York City) 1 position, Ph.D. or Masters student Deadline for Applications: February 14, 2003. Brief Description: Help provide data analytic &

Hello, I am trying to install R packages under linux, some of the packages can not be installed and I got the following error, could anybody give me suggestion on where the problem is and how to fix it? Thanks-e > .libPaths() [1] "/usr/lib64/R/library" [2] "/usr/share/R/library" [3]

Dear R-help, Has anyone experienced similar problem? On WinNT4(sp6), running Rgui from 1.7.0, when try to change directory to some network drive using the "File / Change dir..." menu, Rgui gets a visit by Dr. Watson. If I first change dir to a local drive, then again to a network drive, it works fine. It also works fine with setwd() from the command prompt. Best, Andy Andy I. Liaw,

Dear R users, I've just released a new version of randomForest (available on CRAN now). This version contained quite a number of new features and bug fixes, compared to version prior to 4.0-x (and few more since 4.0-1). For those not familiar with randomForest, it's an ensemble classifier/regression tool. Please see http://www.math.usu.edu/~adele/forests/ for more detailed information,

Dear R users, I've just released a new version of randomForest (available on CRAN now). This version contained quite a number of new features and bug fixes, compared to version prior to 4.0-x (and few more since 4.0-1). For those not familiar with randomForest, it's an ensemble classifier/regression tool. Please see http://www.math.usu.edu/~adele/forests/ for more detailed information,

Under v1.6.2, Windows NT4 OS, when a function contains an execution error and I have placed browser() in inside the function body, the call to browser is ignored. A brief example to illustrate: > foo <- function(x) { + y <- x ^ 2 + browser() + foo2(x) ## Intentional error + x ^ 3 + } > > foo(30) Called from: foo(30) Browse[1]> Error in foo(30) : couldn't find

Sorry for the cross-post: not sure whether it's Rterm or ESS (or something else?)... I'm running R (1.5.0 patched 2002-05-09, compiled from source on WinNT4) under ESS 5.1.21 with XEmacs 21.4.6. When I plotted a graph on the windows() device, and then use the menu in the R graphics window to print the graph, the printer selection dialog box does not show up until I go to the *R* buffer

With the same system configuration (WinNT4 SP6 and 1.7.0), I get such a Dr Watson crash each time I try to use the Change dir... command in the File menu of Rgui.exe. I doesn't seems to happen if I do this immediately after starting R but well if I already did some computation. I don't have any problem by using directly setwd(). At 12:10 23/04/03, you wrote: >Date: Tue, 22 Apr 2003

This is interesting: The crash does not happen if I run Rgui in MDI mode. The crash seemed to only occur in SDI. Andy =========================================================== For the record: Under Rgui, using the menu "File / Channge dir..." to change to a network drive crashes rgui. The crash happens if I browse to a folder on a mapped drive. I.e., if I type in

Dear R-devel, I grabbed 1.7.0 beta from today. "make check" still fails at base-Ex.R. The last few lines of the output are: > lsf.str()#- how do the functions look like which I am using? Error in exists(nam <- nms[i], envir = envir, mode = mode) : F used instead of FALSE Execution halted Looks like the same problem as before, but at a different place. Mandrake Linux

Thanks very much to Paul Murrell and Frank Harrell for addressing my original query (repeated at end of this note). Paul's helpful suggestion with print.trellis and its more= argument, followed by trellis settings, works precisely as I needed. > # snipped from Paul's reply: > p1 <- xyplot(y ~ x, ylim=c(-5, 5)) > p2 <- xyplot(y2 ~ x, pch=16, ylim=c(-5, 5), ylab="

Dear R-help, Has anyone been able to compile R on Linux using Intel's C(++) and Fortran compilers? When I tried it (using R-devel from March 19), I get the following error when it gets to compiling the "methods" package. Can some one tells me where to start looking? What is "error 139"? Any help greatly appreciated! Cheers, Andy PS: This is on Mandrake 9.0, running