similar to: Compatability with Tiger OS X 10.4

Not sure where to even start on this.... I'm hoping there's some debugging I can do... I have a loop that cycles through several different data sets (same structure, different info), performing randomForest growth and predictions... saving out the predictions for later study... I get about 5 hours in (9%... of the planned iterations.. yikes!) and R just freezes. This happens in

Ok, I know R isn't an optimal environment for looping (or so I've heard) but I have a need to loop through columns of data and create new columns of data based on calculations within rows... I'm sure there's a help file, but I'm not sure what search terms to use to find it! The problem is that these new columns need to have names that I can later access... Like NewVar1,

Sorry for the repost, but I've really been looking, and can't find any syntax direction on this issue... Just browsing the documentation, and searching the list came up short... I have some unbalanced data and was wondering if, in a "0" v "1" classification forest, some combo of these options might yield better predictions when the proportion of one class is low (less

"classwt" in the current version of the randomForest package doesn't work too well. (It's what was in version 3.x of the original Fortran code by Breiman and Cutler, not the one in the new Fortran code.) I'd advise against using it. "sampsize" and "strata" can be use in conjunction. If "strata" is not specified, the class labels will be used.

I've seen how to replace the NA's in a single column with a data frame *> mydata$ncigs[is.na(mydata$ncigs)]<-0 *But this is just one column... I have thousands of columns (!) that I need to do this, and I can't figure out a way, outside of the dreaded loop, do replace all NA's in an entire data frame (all vars) without naming each var separately. Yikes. I'm racking my

I have a very large data frame, and I'm doing a conversion of all columns into factors. Takes a while (thanks to folks here though, for making faster!), but am wondering about optimization from a memory perspective... Internally, am I better off assigning into a new data frame, or doing one of these: dataframe<-someoperation(dataframe) It would seem that re-assigning into the same data

You can test if the problem is accumulation in memory registers, which is certainly what this sounds like. Just do a loop over a reasonably small number of iterations and store or print the time between each iteration. If memory accumulation it will run optimally for the first few iterations, after which the time will increase noticeably (essentially exponentially, hence ultimately freezes up). If

Hi, folks! I'm trying to pull in data using read.csv("my URL goes here"), and it really works fantastically. Amazing to pull in live data right off the internet, into RAM, and get busy... however... occasionally there is a server problem, or the data are not up yet, and instead of pushing through a nice CSV file, the server sends a 404 "Not Found" page... Since the

Dear useRs, Release 1.0.0 of the new R package 'randomSurvivalForest' is now available on CRAN and its mirrors. The package implements Ishwaran and Kogalur's Random Survival Forests algorithm for right censored survival data. The algorithm is closely patterned after Breiman's random forests, but suitably modified for the survival setting. Some key features are: o An ensemble

Hi, I have recently upgraded to Tiger and needed a way to launch the rsync daemon on system-startup. Tiger includes the launchd which is responsible for launching daemons. I have made my config file available to download for anybody who is interested in doing the same: http://www.designsolution.co.uk/resources/rsync/ Perhaps this may be added to the resources section of the rsync site?

Our samba server is running Solaris 9 and Samba 3.0.2.a . For reasons *outside the scope of this question* we are using plaintext passwords and authenticating via our NFS server. (I know this isn't a great idea, but that's not the question) With Panther, plaintext passwords worked fine. Snooping, I see the plain text password and username go through. With Tiger, we first had to apply

Hi, I am having some trouble using R 2.13.1 for generating a pmml object of of class "c('randomForest.formula', 'randomForest')" I see that these methods are available: > methods(pmml) [1] pmml.coxph* pmml.hclust* pmml.itemsets* pmml.kmeans* pmml.ksvm* pmml.lm* pmml.multinom* pmml.nnet* pmml.rpart* [10] pmml.rsf* pmml.rules* pmml.survreg*

Hi, thank you for this forum. I want to start my PPLive-Programm with wine but it fails:( Code: noname:~/Desktop/spring/PPTV nadiayu$ wine PPLive.exe fixme:atl:AtlModuleInit SEMI-STUB (0x5afe70 0x5afef8 0x540000) err:ntdll:NtQueryInformationToken Unhandled Token Information class 25! fixme:atl:AtlModuleInit SEMI-STUB (0x336208 0x336020 0x330000) fixme:jscript&#058;DispatchEx_GetTypeInfo

Hi, thank you for this forum. I want to start my PPLive-Programm with wine but it fails:(

Hello, I'm running a PB G4 with Mac OS 10.4.1. I have downloaded the latest version R-2.1.0a.dmg. It appears that R does not work. It launches itself, but the window never gets ready, there is written "Loading R..." and a small progress wheel keeps turning indefinitely. Could someone help or suggest something? THANKS !! Guillaume

[Now the horse has left the barn, I decided to finally implement that backup system I'd been thinking about for ages. Disk crashes can be great motivators] [Web-location for the living version of this document: http://www.lartmaker.nl/rsync/] Goal: Producing a working network backup / cloning system for Mac OS X systems. The system can be used for local backups as well, for example to

Hello, all-- I am having some fun playing with the graphing in quantmod-- very nice! I am writing a function to calculate (and hopefully plot) support and resistance lines, but the usual plot call of "abline(h=value)" does not seem to work. Here's my code: require(quantmod) AAPL<-getYahooData("AAPL") candleChart(AAPL,subset="last 3

Anyone know any issue with OS X 10.4 and CentOS with ssh or any connectivity issue with: OpenSSH_3.8.1p1 vs OpenSSH_3.9p1?

Hi! I upgraded our sambainstallation today since it got into problems with Windows ADS 2003. So I installed all suse rmps for 9.2 (samba 3.0.14) and tested with a few windows boxes and everything works perfektly. No more strange errormessages in the logs about not finding existing users. Now to the problem, when I came back to my own computer, MacOs X 10.4, i suddenly can't use any

The National Ambulatory and Medical Care Survey is a free data set from the CDC that I'd like to analyze using the "Survey" package in R. Before I dive in, though, it occurred to me that someone may already have gone to the trouble of writing code that will bring in the data and assign the variable names and value labels. This is a big file, so doing it from scratch will take