It's very convenient to have R scripts for doing simple plots from the command line. However, running R from bash scripts is not convenient at all. The ideal might be something like #!/path/to/R ... or #!/usr/bin/env R ... but I haven't been able to make either of those work. Another option is keeping the scripts purely in R, e....
I've been trying to learn more about R (and writing C extensions) and I thought it might help to read the source for some well known packages. I decided to start with rpart which is defined as: rpart <- function(formula, data, weights, subset, na.action=na.rpart, method, model=FALSE, x=FALSE, y=TRUE, parms, control, cost, ...) ...
I am using the Emacs-Speaks-Statistics (ESS) mode for Emacs. When editing R code, any comment lines (those starting with #) automatically get tabbed to the far right when I create a new line above it. How should I change my .emacs.el file to fix this? For example, I have: # Comment Now, after putting my cursor at the beginning of t...
When R creates PDFs using pdf() it includes a CreationDate and a ModDate in the PDF. I have a number of such generated PDFs in an svn repository and the effect is that when figures are remade by R, even with the same data, they appear as modified (rightly so) to svn. What's the best way to get the two to play nicely together? I could ...
In R (or S-PLUS), what is a good way to aggregate String data in a data frame? Consider the following: myList <- as.data.frame(c("Bob", "Mary", "Bob", "Bob", "Joe")) I would like the output to be: [Bob, 3 Mary, 1 Joe, 1] Currently, the only way I know how to do this is with the summary function. > summary(as.data.frame(myL...
I have a comma separated file named foo.csv containing the following data: scale, serial, spawn, for, worker 5, 0.000178, 0.000288, 0.000292, 0.000300 10, 0.156986, 0.297926, 0.064509, 0.066297 12, 2.658998, 6.059502, 0.912733, 0.923606 15, 188.023411, 719.463264, 164.111459, 161.687982 I essentially have two questions: 1) How do I p...
I'm working in R, and I'd like to define some variables that I (or one of my collaborators) cannot change. In C++ I'd do this: const std::string path( "/projects/current" ); How do I do this in the R programming language? Edit for clarity: I know that I can define strings like this in R: path = "/projects/current" What I really wa...
I'm creating a package that is going to be used by R (the statistical program), I'm not an expert using this application but I have managed to create a very simple package, using the following logic, I have some classes in C++, as the code has to be compiled using the R compiler and it only allows C code, I have a wrapper C code that cal...
In R, is it possible to extract group capture from a regular expression match? As far as I can tell, none of grep, grepl, regexpr, gregexpr, sub, or gsub return the group captures. I need to extract key-value pairs from strings that are encoded thus: \((.*?) :: (0\.[0-9]+)\) I can always just do multiple full-match greps, or do some...
I've got about 100M value/count pairs in a text file on my Linux machine. I'd like to figure out what sort of formula I would use to generate more pairs that follow the same distribution. From a casual inspection, it looks power law-ish, but I need to be a bit more rigorous than that. Can R do this easily? If so, how? Is there somet...
I was reading about the Weighted slope one algorithm ( and more formally here (PDF)) which is supposed to take item ratings from different users and, given a user vector containing at least 1 rating and 1 missing value, predict the missing ratings. I found a Python implementation of the algorithm, but I'm having a hard time porting it t...
I have a function in R that I call multiple times. I want to keep track of the number of times that I've called it and use that to make decisions on what to do inside of the function. Here's what I have right now: f = function( x ) { count <<- count + 1 return( mean(x) ) } count = 1 numbers = rnorm( n = 100, mean = 0, sd = 1 ) fo...
Hi, I was wondering if it was possible to graph three lines in R using fuctions. For instance, how could I get the functions: 3x+1 4x+2 x+1 to show up on the same graph in r? Thanks so much! ...
What good IDE's are there for R in Linux? I've tried Rcmdr and Eclipse, but neither seems to have the same usability as Tinn-R in Windows. Are there any other options? ...
I have installed R-2.9.1 and I am using Emacs+ESS, but when I start an R process, the version of R is 2.6. I thought maybe Emacs was running R from a weird starting directory. However, if I select my home directory, for example, ESS still starts R 2.6. (Running R at the terminal correctly brings up version 2.9.1.) How do I add a new E...
R newbie question: I have two variables, key and value, and I want to add them as a key/value pair to a list: > key = "width" > value = 32 > mylist = list() > mylist$key = value The result is this: > mylist $key [1] 32 But I would like this instead: > mylist $width [1] 32 How can I do this? ...
Is there any usable emacs mode for Rscript? (Rscript is the script front-end for the R language.) If I type this: #!/usr/bin/Rscript print(commandArgs(TRUE)) and do indent in the ESS R-mode it indents the first line like crazy, since it sees it as a comment: #!/usr/bin/Rscript print(commandArgs(TRUE)) ...
How do you print to stderr in R? This would especially useful for scripts written in Rscript. ...
Is there a package to process command-line options in R? I know commandArgs, but it's too basic. Its result is basically the equivalent to argc and argv in C, but I'd need something on top of that, just like boost::program_options in C++, or GetOptions::Long in perl. In particular, I'd like to specify in advance what options are allow...
I have a data.frame with 2 columns: Node A, Node B. Each entry in the frame implies an edge in a graph between node A and B. There must be a nice one-liner to convert this data.frame into an adjacency list. Any hints? ...