similar to: R program writing standard/practices

Dear R'sians, Would really appreciate if you could suggest a more efficient way to order the columns of a dataset. The column names of the dataset contain indices separated by a period. Following are examples of my code and the dataset. oC <- function(tg=x2) { lth <- length(grep("T",names(tg))) thix <-

Dear R experts, There seems to be a problem (please see the error messages below) with the installation of the latest version of xpose4 (version 4.2.1) with the latest R version.(2.11.1)... I didn't face such installation problems when using version R.2.10.1 Would really appreciate your assistance in debugging installation of xpose 4..2.1 with R.2.11.1 Thanks again.. -Santosh On Wed, Jul

Hello Rxperts.. I have a peculiar situation.. XML library is not available with R2.15.1 whereas I was able to install it with R version 2.13.1. Would highly appreciate your suggestions. I am now trying to see if XML works with previous versions of R. Thanks, Santosh [[alternative HTML version deleted]]

Hi Rxperts, I tried with r-cran-rgl (based on the default installation of Ubuntu) with reinstalled rgl package from R-forge.. I get the missing GL/gl.h header. Didn't reinstall Mesa libraries per recommendations of Duncan. * installing *source* package ?rgl? ...** package ?rgl? successfully unpacked and MD5 sums checkedchecking for gcc... gcc -std=gnu99 checking whether the C compiler

Dear Rxperts, I am aware of Sweave that generates reports into a pdf, but do know of any tools to generate to export to a MS Word document... Is there a way to use R to generate and export report/publication quality tables and figures and export them to MS word (for reporting purposes)? Thanks so much, Santosh [[alternative HTML version deleted]]

Dear R gurus.. Is it possible to control span settings for different values of a grouping variable, when using xyplot? an example code shown below d=data.frame(x=rep(sample(1:5,rep=F),10),y=rnorm(50),z=rep(sample(LETTERS[1:2],rep=F),25)) xyplot(y~x,data=d,groups=z,panel=panel.superpose,panel.groups=panel.loess(span=c(2/3, 3/4,1/2)) or something like..

Dear R-gurus aa <- data.frame(a1=rnorm(20),b1=rnorm(20,0.8),c1=rnorm(20,0.5)) sapply(aa,function(x) histogram(x,breaks=NULL)) or px <- sapply(aa,function(x) histogram(x,breaks=NULL)) print(px,split=c(1,1,1,1),more=F) The above code does not seem to work. am I missing something? Thanks, Santosh [[alternative HTML version deleted]]

Dear Rxperts, Through Windows OS, I created shortcuts (paste as shortcut) to excel spreadsheets ( with "xlsx" as the file extension). I wasn't able to read the shortcuts through R and using "read" functions of "xlsx" package. exf <- "a1.xlsx.lnk" > read.xlsx(exf,1) Error in .jcall("RJavaTools", "Ljava/lang/Object;",

Dear Rxperts! I was wondering if it is possible to write a function which can take in argument of a subset or condition.. Of course, I am aware of the alternate methods like coplot, par.plot, xyplot etc... I am specifically interested in using conditions/subsets with "plot".. A simple fragmented example is shown here.. pltit <- function(y,x,dat,dat1,dat2,sbst) { plot(y~x, data=dat,

Dear all, I am organizing a set of specific R code as package (to ease the documentation and deployment of it to users). Before doing so, I would like to know if there are written coding rules for R (with functions, objects naming convention for example). Thanks a lot, Thomas -- ------------------------------------------------------------- Thomas LOUBRIEU IFREMER IDM/ISI BP70 29280

Hi R-users, Was wondering if there is a way to quickly compute correlations between continuous variables grouped by some categorical variables? What function do I use? Thanks much in advance. Regards, Santosh [[alternative HTML version deleted]]

Dear Rxperts! My colleagues used SAS PROC COPY to generate the xpt files that could be read by the available "xpt" file reading packages in R. However, I am unable to use the R packages for reading SAS transport files generated through SAS PROC CPORT. I have tried SASxport, Hmisc, and foreign. Any ideas/suggestions are more than welcome! Thanks so much! Santosh [[alternative HTML

Dear Rxperts, Was wondering if there is any function in R similar to options("time.zone"): found in S-Plus that can help in looking at the default timezone settings.. Thanks much, Santosh [ [[alternative HTML version deleted]]

Hi Duncan, Thanks for the suggestions. How do I uninstall mesa related installations? Do I need to uninstall all of "mesa" or only the specific ones? Santosh On Fri, Nov 24, 2017 at 3:05 PM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > On 24/11/2017 5:45 PM, Dirk Eddelbuettel wrote: > >> >> On 24 November 2017 at 11:30, Santosh wrote: >> | Hi

Dear R'sians.. I apologize if this topic has been beaten to death and hope that hawks don't pounce on me! Could you please suggest an efficient way to filter rows from 500+ text files (some with 30000+ rows with multiple section table headers) residing in several folders? I guess probably "scan" is the fastest way to scan a file, but, I noticed it sometimes takes a long time

Dear Rxperts Below is a small vector of values of zeros and non-zeros... was wondering if there is an efficient way to get the block sizes of submatrices of a big matrix similar to the one shown below? diagonal elements can be zero too. Rows with only a diagonal element may be considered as a unit block size. c(1,0,0,0,0,0,0,0,0,0,0, 1,1,0,0,0,0,0,0,0,0,0, 0,0,1,0,0,0,0,0,0,0,0,

Dear Rxperts, is there way to identify intervals from continuous data (having some kind of a pattern) and then pick the value of most frequency? a1 <- round(rnorm(50,mean=0,0.1),2) a2 <- round(rnorm(50,mean=1,0.2),1) a3 <- round(rnorm(50,mean=5,1),0) a4 <- round(rnorm(50,mean=14,4),0) a5 <- round(rnorm(50,mean=30,8),0) b1 <- rbind(a1,a2,a3,a4,a5) hist(b1,brea=100) # shows

Dear R-sians Quick question... 1) From a flat (data) file with 100+ columns, how do I read specific columns instead of reading the entire dataset? I am trying to avoid reading the entire file followed by "subsetting". 2) is the a way to a call a column of dataframe through a variable.. e.g. e,g var="date" something like... data${var} <- "02 Oct 2009? Regards,

Hi, Can you add the following two publications from our group to the LLVM publications page. - *Alive-FP: Automated Verification of Floating Point Based Peephole Optimizations in LLVM [pdf] <http://www.cs.rutgers.edu/~santosh.nagarakatte/papers/alive-fp-sas16.pdf> *David Menendez, Santosh Nagarakatte, and Aarti Gupta *To Appear in the Proceedings of the 23rd Static Analysis

I am aware of one (unofficial) guide to style for R programming: http://www1.maths.lth.se/help/R/RCC/ from Henrik Bengtsson. Can anyone provide further pointers to good style? Views on Bengtsson's ideas would interest me as well. David Scott _________________________________________________________________ David Scott Department of Statistics, Tamaki Campus The University of Auckland,