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...;with":"with.default" vsize.small max.vsize.small vsize.large max.vsize.large 30841 63378 20642 660787 nodes max.nodes duplications tot.duplications 3446132 8115016 12395 61431787 samples 4956 Any suggestions? Is it something about the use of loops in R? Is it maybe the try's??? Thanks in advance for any help, Ramiro [[alternative HTML version deleted]]

I have data that looks like this: > df1 group id 1 red A 2 red B 3 red C 4 blue D 5 blue E 6 blue F I want a list of the groups containing vectors with the ids. I am avoiding subset(), as it is only recommended for interactive use. Here's what I have so far: df1 <- data.frame(group=c("red", "red", "red", "blue",