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outputdata
2013 Mar 13
3
loop in a data.table
Hi everyone,
I have a data.table called "data" with many columns which I want to
group by column1 using data.table, given how fast it is.
The problem with looping a data.table is that data.table does not like
quotations to define the column names (e.g. "col2" instead of col2).
I found a way around which is to use get("col2"), which works fine but
the