Rmark - uneven survey intervals

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Rmark - uneven survey intervals

Postby Blackbeard » Thu May 03, 2018 9:21 pm

Hello,

A question with a mix of both R coding (Rmark) and theory.
I've surveyed several sites over a period of a year with a winter break in the middle. Number of surveys at each site has varied as well as the interval between surveys.
I realize that I can incorporate uneven time intervals within the "process.data" function ("time.intervals = ").
I can set intervals to days (rather meaningless for Phi) or alternatively I can calculate this as weeks (in which case i'd consolidate several site surveys into a single week).
Would I need to set my ch data with "." for dates when I surveyed one site but did not the others (could only do one site per night).
For example (excluded several sites):

....0.0....0.0.....1........0.0........0..0. 1 site1
....0.0....0.0.....0........1.0........0..0. 1 site1
....0.0....0.0.....0........1.0........0..0. 1 site1
............1...........0....0.......0..0... 1 site2
............1...........0....0.......0..0... 1 site2
............0...........1....1.......0..0... 1 site2
.11.......0.....1........................... 1 site3
.10.......0.....1........................... 1 site3
1..0...0.........0...0...................... 1 site4
1..1...0.........0...0...................... 1 site4

Time intervals as (days): c(14, 32, 2, 1, 1, 12, 1, 1, 1, ..., 116, 1, 1, ... ).
Happy to send the raw data if needed to better grasp.
Greatly appreciate your time.

Regards,
Gil
Blackbeard
 
Posts: 1
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Re: Rmark - uneven survey intervals

Postby jlaake » Fri May 04, 2018 3:06 pm

Yes that is exactly what you need to do to make the time intervals constant across sites.
jlaake
 
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Location: Escondido, CA


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