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I'm trying to figure out how to get the text captured by capturing groups out of a regex match. For instance, let's say I have the pattern "foo ([^ ]+)" and I match it against the string "This is a foo sentence I am reading." The group in the pattern will match the word "sentence" in the target string. How can I get access to this matched group? All I

Is there anything like cumsum and cumprod but which allows you to apply an arbitrary function instead of sum and product? In other words, I want a function cumfunc(x, f) that returns a vector, so that for all n up to the length of x cumapply(x,f)[n] = f(x[1:n]) This would give cumsum and cumprod as special cases when f=sum or f=prod. I could write such a function, but I can't see

Full_Name: Brendan Barnwell Version: 2.9.0 OS: Windows XP Pro Submission from: (NULL) (71.102.131.29) The ave() function returns an incorrect datatype. Specifically, ave(x, g, f) always returns a vector with the same mode as x, rather than using the mode of the vector returned by f. Observe: > x [1] "A" "B" "C" "A" "B" "C"

I've been using the ave function to compute some statistics on a data frame. After a while I noticed that, for some reason, it was returning numerical statistics as strings instead of numbers. I delved into the code of the functions and traced the problem to the following fact: ave uses split<- to do its work. Specifically, it does "split(x, g) <- lapply(split(x, g),

I've been using Tinn-R with RGui on Windows for quite some time now, but it's very irritating how the Windows RGui allows only very rudimentary line-editing. I can't even use shift-arrow key to select text! I searched through the archives and found what seemed to be a few people asking about this, but I couldn't find a clear answer. I saw some references in the docs to