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Alex Rivera
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I have a data frame with about 200 columns, out of them I want to group the table by first 10 or so which are factors and sum the rest of the columns. I have list of all the column names which I want to group by and the list of all the cols which I want to aggregate. The output format that I am looking for needs to be the same dataframe with same number of cols, just grouped together. Is there a solution using packages data.table , plyr or any other?
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