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areaprotected
2011 Nov 02
2
Sum with condition
I guess my problem is simple for most of you but I am new with R and I need
some help,
I have a dataframe :
CELLCD AreaProtected
8928 52.39389
8928 41.91511
8929 21.21975
8929 63.65925
8930 26.08547
8930 14.04602
I wouldlike to sum the AreaProtected if it is the same CELLCD in another
column :
CELLCD AreaProtected SumAreaProtected
8928 52.39389 94.309
892...