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task
2005 Apr 05
1
summing columns using partial labels
I have a dataset of the form
Year tosk.fai tosk.isd tosk.gr ....... tosk.total hysa.fai
hysa.isd ...
and so on. I want to sum all the columns using the first four letters in
the columns label(e.g. 'tosk', 'hysa' etc.). How can you do that? Also,
the sums should be without the '.total'column (e.g....