On 4/25/07, Spilak,Jacqueline [Edm] <[EMAIL PROTECTED]> wrote:
> I have a data set that I have imported (not sure if that makes a
> difference) and I would like to calculate the sum of only specific
> columns. I have tried
> >colSums(dataset, by=list(dataset$col5), dims=1) and I get an error of
>
I have a data set that I have imported (not sure if that makes a
difference) and I would like to calculate the sum of only specific
columns. I have tried
>colSums(dataset, by=list(dataset$col5), dims=1) and I get an error of
unused arguments
I have also tried
>aggregate(dataset, by=list(dataset$co
