Dear List,
I have a question of convenience,
I am looking to sum the values of one column based on another column - a
example may help explain better!
ED ECOCODE
21.809467 AA0101
36.229566 PA1201
51.861284 PA1201
11.36232 PA1201
27.264634 PA1201
12.261986 PA1201
46.519313 PA1201
7.815376 PA1201
2.810428 PA1201
13.478372 PA1201
35.670182 PA1301
27.128715 AT0801
19.010294 AT1201
15.475368 AT1201
18.597983 AT0101
29.292615 AT0101
6.749846 AT0101
14.981488 AT0101
14.93511 AT0101
14.93511 AT0101
21.040785 AT0101
8.271615 AT0101
12.94232 AT0101
6.749846 AT0101
15.484412 AT0101
29.644494 AT0101
43.211212 AT0101
So for AA0101 it would be = 21.809467
AT1201 it would be = 19.010294+15.475368
etc
I would then like to be able to output a table with ECOCODE in one column and
the sum of ED in the other.
This is stored in a dataframe called ecoregion, i understand people like having
code to change but i have none as i am a relative beginner! Sorry in advance!
Thanks
Peter
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