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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 [[...