Thanks!
I tried reading the help for aggregate and can't figure out which form
of the formula I am using, and therefore the syntax.
I'm getting the below error.
> aggregate(counts ~ ind, merge(stack(CAT2COG), df, by = 1), sum)
Error in as.data.frame.default(x) :
cannot coerce class "formula" into a data.frame
> aggregate(counts ~ Cats, merge(stack(CAT2COG), df, by = 1), sum)
Error in as.data.frame.default(x) :
cannot coerce class "formula" into a data.frame
> Cats
[1] A B C D E
Levels: A B C D E
> aggregate(counts ~ COGs, merge(stack(CAT2COG), df, by = 1), sum)
Error in as.data.frame.default(x) :
cannot coerce class "formula" into a data.frame
On 24-Oct-10, at 12:50 AM, Gabor Grothendieck wrote:
aggregate(counts ~ ind, merge(stack(CAT2COG), df, by = 1), sum)
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