Anika:
1. You do realize that all columns of your result will be character
(even if they started out as numeric).
2. That being the case, all your data frame columns can be considered
to be character to begin with.
3. That being the case, convert your data frame to a matrix: mdf <-
as.matrix(df)
Given the size of my dataframe (>400 columns, >35000 rows), I should
have clarified that speed and efficiency is perhaps as important as
"elegance", and I'd like to use the examples to learn about any
corrections and improvements I can make in the examples I provided.
Thanks for any help you can of
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