similar to: Plot timer in a for loop

I would like to create a new dataframe from the DateTime column of an existing dataframe and a numeric vector. When I do cbind(x[,1], y) the result is: [1,] 1199370600 12.500 [2,] 1199371200 69.375 [3,] 1199371800 23.750 where the first column you see used to look like: "2008-01-03 08:30:00 Central Standard Time" "2008-01-03 08:40:00 Central Standard Time"

Dear all R-helper, if I want to use stdout from other language as my R program input ,which is the best way for design the API,using Pipe function or produce a temporary file,using scan function to read the file ? thanks Michael

Hello... I would like to use R for 'pipelining' data among several programs. I'm wondering how I can use R to call another program, feed that program a set of parameters, and retrieve the output. E.g., I have an executable that, when opened, prompts the user to enter a set of parameters. The program then executes & prompts the user for the name of an output file. I need to

Hi, I am trying to figure a way to allocate a string SEXP so that gc() won't ever collect it. Here is a little bit of a background. Suppose I want to write a .Call-callable function that upon each call returns the same value, say mkChar("foo"): SEXP getFoo() { return mkChar("foo"); } The above implementation doesn't take advantage of the fact that

The release schedule has now been set with a release date on April 18. The detailed procedure can be found at http://developer.r-project.org/ (it is not quite there yet, but will appear after a short propagation delay.) The main point for non-developers is that we start making alpha tarballs on March 21 and beta tarballs on April 4. Only very simple and/or critical bugs are fixed in the last

I have used Sweave a lot the latest year, but never really used any long function calls. If I have code which look like this ------------------------------------------------------------- gof <- benthic.flux(ID="Gulf of Finland", meas.conc=conc, bw.conc=bw.conc, time=times,

Hi, for presentation purposes I would like to clear to whole console window (like in a UNIX terminal: 'clear'). Is there such a function? If not, I could image that is not too hard to write such a function. Cheers, Hans

Can anyone point out why this is not working? y<-read.table(pipe(' awk '{ n = $1; sub( ".*" $1 " " ,"") ; while ( n-- ) print }' temp.txt ')) [[alternative HTML version deleted]]

Dear all, I would like to start a process from an R program in such a way that I can both feed input into the process and read the process's output. It seems that in R, I can have a pipe for writing into another process's input or a pipe for reading from another process's output, but not both. Doing both necessitates forking, such that the child can start the external process and

Dear all, I would like to start a process from an R program in such a way that I can both feed input into the process and read the process's output. It seems that in R, I can have a pipe for writing into another process's input or a pipe for reading from another process's output, but not both. Doing both necessitates forking, such that the child can start the external process and

How precise is R numerically? For example I wrote the following function for calculating the volume of the ball inscribed in the unit cube in m dimensions. In order to see what happens in 40 dimensions, I created an output of 24 digits. But how many are precise? Thanks Josef Eschgf?ller Ferrara --------------------------------------- Vol = function (m) {if (m<=1) 1 else Vol(m-2)*pi/(m+m)}

I have been using the fork package on a cluster to spawn jobs. I have noticed that I end up with many "R defunct" (zombie) processes following the use of fork that do not die completely until I close down R. Initially, I thought it may be my code but I ran the example from the latest fork package (see code below) on R.2.3.1 and ended up with the same problem. The code from the

Hi, I am using the following command to print to a file (I omitted the file details): cat( paste( paste(orientation, start, end, names,"\n"), paste(start, end, "exon\n"), sep="")) where "orientation" and "names" are character vectors and "start" and "end" are integer vectors. The problem is that R coerce the integer vectors

Can anyone please help me understand whats happening here? Thanks Tom getAmpRatio<-function(v_amps){ #calculates the amplitude ratios between the 3 largest amps and the rest bigamp<-0 map<-rep(TRUE,length(v_amps)) for(iLoc in 1:3){ bigamp<-bigamp+max(v_amps) map[which.max(v_amps)]<-FALSE v_amps<-v_amps[map]

Hi Dumb question time again, for which I apologise. I have a variable that contains the following numerical text "04010". This is the name to access a list: > as.list(KEGGPATHID2NAME)$"04010" [1] "MAPK signaling pathway" Marvellous! Except I want to do that when "04010" is assigned to a variable called path and I can't figure out how to do it!

Dear all, Thanks to those 3 people who sent me answers to my question. Got the problem solved. Great! Now, another question of mine is: I would like to run an R script from the Linux prompt. Is there any way possible to do this? The reason is, the calculation that I'm doing takes a few hours, and I would like to automatize it. Or does it mean that I have to run source within the R

Hi All, I am looking for references on R as a programming language (apart form the standard R-lang.pdf and the other manuals), reference that would cover _in_depth_ things like loops, code optimisation, debugging tools etc... and is as up-to-date as possible. Can anyone suggest any book or other reference apart from the "green book" and the V&R "S-programming"? Cheers,

Please read this first: http://www.perceptualedge.com/articles/visual_business_intelligence/dual-scaled_axes.pdf It's a reasoned discussion of why it's a bad idea and proposes some alternative methods. Another good article is: K. W. Haemer. Double scales are dangerous. The American Statistician, 2(3):24?24, 1948. People have been advising dual-axis plots for (at least) 60 years! Hadley

Hello world, short question: is there a possibility to get a list of arguments of a function *with* variable/parameter types? formals() gives me the names of the parameters, but says nothing about the parameter type it expects (I know I can always use the help function). I would like somthing like $x: vector or data.frame... Thanks in advance... Georg -- Georg Hoermann, Fachabteilung

Dear All, I saved by mistake the environment I was working in after typing q(), and now I get the annoying message: [Previously saved workspace restored] I have already deleted all the objects in the environment, saving it as an empty environment, so it's just a matter of nitpicking I suppose. The message does not appear if I start R from any other place in the directory tree. I am