[R] ggplot - class "character" problem
ross.culloch at dur.ac.uk
Tue Sep 13 13:32:41 CEST 2011
I suspect it is to do with your method of creating the dataframe, I would
check to see if the columns in the df are numeric, which you can do by:
for each variable, if it is not numeric (and at least one must be a
character, given the error message) then redefine as a numeric
I reckon people better versed in R will have a more efficient solution, but
that should work......
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