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2011 May 12
2
Simple order() data frame question.
...or some reason I just don't follow the examples there. I must be missing something about the data frame sort there but what?
I originally wanted to reverse-order my data frame df1 (see below) by aa (a factor) but since this was not working I decided to simplify and order by bb to see what was haqppening!!
I'm obviously doing something stupid but what?
(df1 <- data.frame(aa=letters[1:10],
bb=rnorm(10)))
# Order in acending order by bb
(df1[order(df1[,2]),] ) # seems to work fine
# Order in decending order by bb.
(df1[order(df1[,-2]),]) # does not seem to work
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