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gk208
2009 Nov 05
2
Merge records in the same dataframe
Hi:
Suppose that I have a data frame as below
x1 x2 x3 ... x10 wk1 wk2 ... Wk208 (these are the column names)
For each record, x1, x2, x3 ... x10 are attributes. and wk1, wk2, ..., wk208 are the sales recoreded for this attribute combination. Suppose that now, that I want to do the following
1. Merge the data frame so that I have a new data frame grouped by values of x2 and x...