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libertas
2007 Mar 24
2
Two Problems while trying to aggregate a dataframe
Hello!
Given is an Excel-Sheet with actually 11,000 rows and 9 columns. I want
to work with the data in R. The contents are similar to my following
example.
I have a list with ID-number, personal name and two kinds of
loan-values. I want to aggregate the list, that for each person only one
row remains and where the loan-values are added.
First I tried some commands with tapply but had no