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prctl
2010 Dec 15
2
Cumulative percentage by unit of time
...ween LD and SD, the nest is termed "active". Each nest id
occur once in the data frame.
How could I get the cumulative percentage of active nests by date within a
specified time frame ? Let's say from Julian date 60 to 273 ?
I would like the results to look like this :
Julian_date prct_ active
60 0
61 5
62 10
63 25
...
Here is an example of the data frame
nest_id LD FD
1 193 219
2 131 159
3 196 221
4 152 179
5 136 164
…
Cheers,
Sebastien
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