similar to: Multithread processing

Hello R Pioneers, I sometimes use R on a dual CPU PC runing Linux and find that only 1 CPU is used even when no other user/process competes for resources. Can we make R uses both CPUs to have the job done sooner? I know this is probably asking too much for something that is free. Has anyone else thought about it? Thanks. Ming Chow

Oops. Seems I only sent this to myself. T. -------------- next part -------------- An embedded message was scrubbed... From: "Timothy H. Keitt" <tklistaddr at keittlab.bio.sunysb.edu> Subject: Re: [R] Multithreading Date: 16 Apr 2002 12:34:52 -0400 Size: 2091 Url: https://stat.ethz.ch/pipermail/r-help/attachments/20020416/dd6c9385/attachment.mht

Hi folks, is it possible to read more things about R behavior in multiprocessor / multihost environment ? Is there any distributed computation project associated to it ? Laurent

Hello, I checked mail list archives and this topic came up before in March '99 (about ability of R to multithread). At that time rossini at biostat.washington.edu (Tom Rossini) suggested to check his web page in a few month as it was on his list to-do. I checked but the web page is not valid. I wanted to know if in general progress has been made in the area, or if it is planned. I was also

As far as I can see by searching the archieves, R could not take advantage of two processors in the same machine but there were plans for implementing multithreading in R. Is this work going on? On the other hand, if two processors are present in the same linux machine is it possible to focus one processor on tasks of the operative system and the other on R and/or other real computing? Could

Almost all of the heavy crunching I do in R is like: > for(i in long.list){ + do.something(i) + } > collect.results() Since all the invocations of do.something are independent of one another, there is no reason that I can't run them in parallel. Since my machine has four processors, a natural way to do this is to divide up long.list into 4 pieces and then start 4 jobs, each of which

Hi All, I would like to use anonymous cvs, but it appears not to be working (again?). There was a discussion back in Jan-Feb about whether to continue supporting it, but it seemed that Tony Rossini got it working and the discussion left off there. Did someone decide to disable it, or is it just not working properly? Here's the details: $ cvs -d

Dear R users, I ran into this curious problem: > d <- rnorm(100) > d.density <- density(d) > sum( d.density$x * d.density$y) [1] 2.517502 Admittedly the method of computing the mass under the density curve at line 3 is crude. But 2.5 is pretty far from 1, the value it should be. I tried a few other dataset and got similar result. Am I missing something obvious? Or is the return

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

As a user of only R, I don't use much of the potential of ESS and Emacs. Without entering a religious feud, is there any reason I should use XEmacs rather than my current GNU Emacs? (I looked on the XEmacs site, but I didn't understand the programming issues they were talking about (over my head).) Martin Henry H. Stevens, Assistant Professor 338 Pearson Hall Botany Department Miami

Dear R experts, Sorry, I am resending this, since I have not received this mail myself for the past 5 hours. I saw a similar question dated July 2. But there is no answer to it. Does anybody have a solution to it? I am using window NT, and the R version is 1.5.1, the SJava package is the binary version SJavaWin_0.62-8.zip. Here are the error message: > library(SJava) > .JavaInit()

Hi Folks, I'm currently looking at missing data/imputation methods (including multiple imputation). S-Plus has a "missing data library". What similar resources are available within R? Or does one roll one's own? Best wishes to all, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk>

I have a few questions regarding the snow package: 1) Is fine-grained parallelism even possible with R/snow? (ie, one task that spawns sub-tasks to do work, with results sent back to the parent task). The example(s) only seem to be totally-independent processing (which can be done just as easily with shell-script wrappers....) 2) If so, is an example available? 3. If not, then it is still

Is there any way to process the "vignette" documantation files? I have been looking at the bioconductor packages and most of them have *.Rnw files in doc directories. They look like regular TeX but have sections showing R code that seem to choke TeX. Thanks, Andy __________________________________ Andy Jaworski Engineering Systems Technology Center 3M Center, 518-1-01 St. Paul, MN

Hello everyone, Thanks to all who offered suggestions after my initial query to the list. I've been busy trying to absorb the docs as fast as possible, but this little thing has me stumped for the moment. I'm creating a random sample of 100 item and saving it to a vector named 'iq'. I'd like to create a second vector (iq_prime, say) by adding 20 to each element of the

Hello everyone, Thanks to all who offered suggestions after my initial query to the list. I've been busy trying to absorb the docs as fast as possible, but this little thing has me stumped for the moment. I'm creating a random sample of 100 item and saving it to a vector named 'iq'. I'd like to create a second vector (iq_prime, say) by adding 20 to each element of the

Dear list members, I've had helpful feedback from a number of people, several of whom experienced some problems getting my XEmacs/ESS configuration files for Windows to work properly. I will, of course, make changes based on this feedback, but the following information may be of use in the interim: (1) It's clear that my instructions and installation procedure were insufficiently

Dear list members, I've had helpful feedback from a number of people, several of whom experienced some problems getting my XEmacs/ESS configuration files for Windows to work properly. I will, of course, make changes based on this feedback, but the following information may be of use in the interim: (1) It's clear that my instructions and installation procedure were insufficiently

could we add an argument to suppress printing of levels for print.factor()? i.e.: print.factor <- function (x, quote = FALSE, print.levels = TRUE, ...) ## MODIFIED { if (length(x) <= 0) cat("factor(0)\n") else print(as.character(x), quote = quote, ...) if (print.levels) { ## ADDED cat("Levels:

Sam Rushing's Python extension 'calldll' will supposedly give me access to any DLL, and presumably R.DLL in particular, from Python. I have no experience manipulating DLLs as yet. I am learning Python. I can't find any simple step-by-step instructions on how to get done what I want to do. Does anyone have experience with this? Is there a better way? Of course, one can use