Displaying 1 result from an estimated 1 matches for "sum_dup".
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sum_buf
2007 May 29
2
summing up colum values for unique IDs when multiple ID's exist in data frame
I have data.frame's with IDs and multiple columns. B/c some of IDs showed up
more than once, I need sum up colum values to creat a new dataframe with
unique ids.
I hope there are some cheaper ways of doing it... Because the dataframe is
huge, it takes almost an hour to do the task. Thanks so much in advance!
Young
# ------------------------- examples are here and sum.dup.r is at the