The dirname() function looks very helpful; I hadn't heard of that one before.
I'm still reading up to see how the parent.frame command does what it does;
I didn't realize that the ofile variable might not be around in the future.
Richard's suggestion -- source("c:/myfullpath/myfile.r", chdir=TRUE) -- is
probably the best; I would still have to update "myfullpath" if I move
myfile.r, but that's not hard to do.
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