similar to: using mclapply (multi core apply) to do matrix multiplication

??I would like to apply a function, fract, to the columns of a dataframe. I tried the following apply(data5NonEventEpochs,2,fract) but, no surprise it did not work as apply works on matrices not data frames. How can I apply a fuction to the columns of a data frame? (I can't covert data5NonEventsEpochs to a matrix as it contains character data). Thank you, John John David Sorkin M.D., Ph.D.

Dear all I would like to ask you if an assignment can be done inside a lapply statement. For example I would like to covert a double nested for loop for (i in c(1:dimx)){ for (j in c(1:dimy)){ Powermap[i,j] <- Pr(c(i,j),c(PRX,PRY),f) } } to something like that: ij<-expand.grid(i=seq(1:dimx),j=(1:dimy)) unlist(lapply(1:nrow(ij),function(rowId) { return

Hi, I was wondering if there's a function in R that is meant to return a string representation of an object. Basically, it's like print() but it doesn't print anything, it only returns a string. I know there's a str() function but it's not quite the same. I mean a function that returns the same string that print() would display. -- Bye, Ernest

Running the example in the documentation causes R to crash. dario at bioinfo:~$ R R version 3.0.3 (2014-03-06) -- "Warm Puppy" Copyright (C) 2014 The R Foundation for Statistical Computing Platform: x86_64-pc-linux-gnu (64-bit) R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or

Dear members, I am using pbmcapply to parellise my code. But the following code doesn't work: > LYG <- pbmclapply(LYGH,FUN = arfima,mc.cores = 2,mc.preschedule = FALSE) | | 0%, ETA NA^ It just hangs. But the

On Fri, 9 Jun 2023 18:01:44 +0000 akshay kulkarni <akshay_e4 at hotmail.com> wrote: > > LYG <- pbmclapply(LYGH,FUN = arfima,mc.cores = 2,mc.preschedule = > > FALSE) > | > | > 0%, ETA NA^ > > It just hangs. My questions from the last time still stand: 0) What is your

Hi, I wondered about the behavior described in the following stackoverflow question: https://stackoverflow.com/questions/20674538/mclapply-returns-null-randomly More specifically, I would like to know if you ever considered the suggestion made in the comments of the first answer, namely to somehow warn the user if one of the processes has been killed by the out-of-memory killer ? I am always

Dear Ivan, REgrets to reply this late... By "holding a lock", you mean a bug in the process right (I am not a computer science guy, excuse my naivete)? THanking you, Yours sincerely, AKSHAY M KULKARNI ________________________________ From: Ivan Krylov <krylov.r00t at gmail.com> Sent: Thursday, May 18, 2023 1:08 PM To: akshay kulkarni <akshay_e4 at

Dear Sir, I have xlsx data set which I have imported to R studio. Now some of the variables are defined as numeric but I want define them as factor variable so that I run classification algorithm in R. Please to covert the variables. Thanks and Regards Abu Afzal PhD Eco JNU India

Hello, I have an asterisk server running with 23 g.729 licenses. I have also purchased a sound file from thevoice.digium.com. I need to covert this file (uLaw, PCM I think) to g.711, g.729 & g.723 for use with an IVR system. Is there a way I can convert the files using the g.729 digium codec? sox? Thanks -Matt -- Matthew S. Crocker Vice President Crocker Communications,

Hi Guys, I and trying to covert a float to a f16. calling DAG.getNode(ISD::FP_ROUND, DL, Op->getValueType(0), FloatNode); will get the error message:"Invalid method to make FP_ROUND node" what is the "right" way to make this work? best Kevin -------------- next part -------------- An HTML attachment was scrubbed... URL:

I am doing an experiment which involves detecting co-resident VMs (testing if 2 VMs are on the same physical machine) on KVM. I have tried using cache covert channel, but this test does not work if the VMs are on different processors within the same host as the caches are not shared then. If I use the tools netperf and iperf to differentiate using network channels, I am not getting clear results.

Hi, I wanted to covert all my erb over to haml, but I use HTML5 tags like nav, section, article, etc. Any idea if this is supported by haml? Checked out their site, nothing mentioned there or did I miss something. Sorry noob here. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to

? Sat, 20 May 2023 10:59:18 +0000 akshay kulkarni <akshay_e4 at hotmail.com> ?????: > By "holding a lock", you mean a bug in the process right Well... one person's bug ("your threaded program breaks if I fork() the process") is another person's documented behaviour ("of course it does, it says 'please do not fork()' right in the manual").

Hi every one. I'm learning how to use sapply (and other function of this family). Here's what I'm trying to do. I have a vector of lets say 5 elements. I also have a matrix of nX5. I would like to know how many element by column are inferior to each element of my vector. On this example: v = c(1:5) M = matrix(3,2,5) I would like to have a vector at the end which give me 0 0 0 2 2

Hello R-users,    I have a data frame whose names of columns I don't know a priori, but the user of my code will know them. The user is supposed to save the name of the column that will need some reordering of the levels of the factor later on. The name of the column will be saved in an object called: variab the data frame is called df. If I try to the do following:

From the R Installation and Admin manual: "There is a tendency for re-distributors of R to use ?enhanced? linear algebra libraries without explaining their downsides.? There?s a downside not mentioned in the manual that caught and baffled me for a while. I was using all 64 cores of an AWS instance via parallel::mclapply() and doing matrix multiplications in the parallelized function. If

Hi All, I recently found gmane http://gmane.org/ It's a system to covert mail to news and back, with the nice property of keeping a searchable archive... Very convenient if you are subscribed to many lists and don't want to have your mail box cluttered. I use it to read several mailing lists already, but R is not available there. I wonder if the admins know about gmane and if they

Hi. I'm trying to write an application to retrieve financial data (specially bonds data) from FINRA. The web page is served dynamically from an asp.net application: http://cxa.gtm.idmanagedsolutions.com/finra/BondCenter/AdvancedScreener.aspx I'd like to know if it's possible to fill dynamically the web page form from R and, after filling it (with the issuer name), retrieve the web

Hi. I'm trying to write an application to retrieve financial data (specially bonds data) from FINRA. The web page is served dynamically from an asp.net application: http://cxa.gtm.idmanagedsolutions.com/finra/BondCenter/AdvancedScreener.aspx I'd like to know if it's possible to fill dynamically the web page form from R and, after filling it (with the issuer name), retrieve the web