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Something quite annoying to me is when I get an R script and I have to change all of the file references in the script. I get something like this this:
 source("C:\\Documents and Settings\\UserName\\Data\\...\\File1.R") data<-read.table("C:\\Documents and Settings\\UserName\\Data\\...\\SomeData.dat") 
Besides these being unsightly, file references are also a pain to change. Usually I just delete all but the filename. How can I get away with that? because R remembers what directory you are dealing with and makes all file references relative. so the above becomes: