Re: [R] Efficiently parallelize across columns of a data.table

Last time I looked (admittedly a few years back), on unix-alikes (which you seem to be using, based on your use of top), foreach/doParallel used forking. This means each worker gets a copy of the entire R session, __but__ modern operating systems do not actually copy on spawn, they only copy on

[R] Efficiently parallelize across columns of a data.table

I am trying to parallelize a task across columns of a data.table using foreach and doParallel. My data is large relative to my system memory (about 40%) so I'm avoiding making any copies of the full table. The function I am parallelizing is pretty simple, taking as input a fixed set of columns and

Re: [R] C/C++/Fortran Rolling Window Regressions

I looked into why the coefficients differ in Gabor's example and it's because the example mistakenly switched the order of x and y. The syntax is roll::roll_lm(x, y), which is the same as fastLm, but the example accidentally switched them. After correcting the example, the coefficients are all

Re: [R] [FORGED] Re: file.create issue

On 20/08/16 11:16, David Winsemius wrote: On Aug 19, 2016, at 6:47 AM, PIKAL Petr wrote: Thank you , John. As I wanted to use com as abbreviated value for comments it gave me hard time, especially when the name was not only com1 but "com1.txt". Whinges about the

Re: [R] file.create issue

The list of illegal file names on Windows 7 includes "aux", "prn", "lpt[1-9]", "com[1-9]", and "con", with or without a 'dot file extension' and in any directory. I think there used to be be other illegal ones, like "nul", "pc$mouse" and "clock". Bill Dunlap TIBCO Software wdunlap tibco.com On

Re: [R] file.create issue

> On Aug 19, 2016, at 6:47 AM, PIKAL Petr wrote: > > Thank you , John. > > As I wanted to use com as abbreviated value for comments it gave me hard > time, especially when the name was not only com1 but "com1.txt". > Whinges about the behavior of Windows are OT on

[R] pheatmap breaks

Hi group: I tried multiple times cannot understand the breaks to work for my heatmap. I am using following way: pheatmap(chxx, cluster_cols=FALSE, annotation_col=annotcols, annotation_colors=anno_colors, col=colorRampPalette(c("dark blue", "white", "#ff"))(34), show_colnames=F) >

Re: [R] file.create issue

Thank you , John. As I wanted to use com as abbreviated value for comments it gave me hard time, especially when the name was not only com1 but "com1.txt". Best regards Petr > -Original Message- > From: Fox, John [mailto:j...@mcmaster.ca] > Sent: Friday, August 19, 2016 3:15 PM > To:

Re: [R] character vector manipulation and saving

Hi all. I managed to achieve desired with for (i in 1:length(radky)) { fname <- paste("coment",i,".txt", sep="") file.create(fname) fileCon <- file(fname, "w") writeLines(test[radky[i] : (radky+pocet)[i]], fileCon) close(fileCon) } For all on Windows - do not use "com1.txt" for file naming (see

Re: [R] file.create issue

Dear Petr, This is a Windows OS issue, not peculiar to R. There are some reserved names that can't be used for files, including COM1 (the first serial port). Other examples include LPT1 and AUX. Because file names in windows are case-insensitive "com1.txt" also causes problems. I hope this

Re: [R] file.create issue

Hi Petr, I think it does matter, because it seems there is no problem on Mac OS 10.9.5. Now, don't ask me why, I have no idea! Ivan -- Ivan Calandra, PhD Scientific Mediator University of Reims Champagne-Ardenne GEGENAA - EA 3795 CREA - 2 esplanade Roland Garros 51100 Reims, France +33(0)3

Re: [R] facing problem in setting order of the levels in factor

Hi, I think you are looking for this: y <- factor(x, levels=c("M","F","T")) If you use the function levels(), you change the labels, but not the order, so that the first level (previously "F") will now be labeled "M", the second (previously "M") will now be labeled "F" ,and so on. This

[R] file.create issue

Hi Can anybody explain why one character makes such a difference? > file.create("com1.txt") [1] FALSE Warning message: In file.create("com1.txt") : cannot create file 'com1.txt', reason 'No such file or directory' > file.create("con1.txt") [1] TRUE > It took me quite effort to find out that

[R] facing problem in setting order of the levels in factor

Hi all, I'm just a beginner in R. I have a pretty basic doubt. This is the actual quote I wrote > x<-factor(c("M","F","M","T","M","T")) > levels(x)=c("M","F","T") > x [1] F M F T F T Levels: M F T > table(x) x M F T 1 3 2 Expectation: I just wanted to change my baselevel from F to M. with the

[R] problem concernig Survsplit, package survival

Dear R-help-community, I hope, that�s the appropiate channel to post a quastion? For some days I have been struggling with a problem concerning the �survSplit�-function of the package �survival�. Searching the internet I have found a pretty good -German- description of Daniel Wollschl�ger

[R] RJDBC - Java connection to Oracle database crashing on execution

Hi, I have a script that starts with some code to open a connection to an Oracle database, however the code is crashing R/RStudio as soon as it runs. The code does run successfully on another machine. The script opens by loading the required RJDBC package: library("RJDBC", lib.loc="C:/Program

Re: [R-es] Porcentajes por grupos

Excelente. Muchas gracias! El 18 de agosto de 2016, 20:03, Carlos Ortega escribió: > Hola, > > Puedes hacerlo en dos pasos... > > #--- > DT[ , SumValores := sum(Valores), by = "AñoMes"] > DT[ , Porcen := Valores/SumValores] > > head(DT) >

Re: [R] R Shiny convert into Java

You should try these: http://www.renjin.org https://github.com/allr/purdue-fastr which are two R interpreters in Java. But I am not sure that shiny can work on these. Sincerely Marc Le 16/08/2016 à 15:11, Venky a écrit : Hi, How to run Shiny (Server,UI) into JAVA? I am running R Shiny

[R] character vector manipulation and saving

Dear all I have charater vector which is result of readLines reading of a file. Something like dput(test[1:15]) c("Date", "42523", "Comment received", "dfvadfvadfbvadfbv fvbadfvdfv cfczfbffbvfdv", "Date", "42523", "Comment received", "aa bbb