Coding missing values in Royle point-count occupancy models

questions concerning analysis/theory using program MARK

Coding missing values in Royle point-count occupancy models

Postby ajpaul » Thu Jan 19, 2012 5:48 pm

[originally posted on RMark]
Thought this would be an easy problem to resolve but have turned up empty handed after a couple of searches on the forum and elsewhere. Apologies in advance if my search skills are lacking.

How do you code missing values in the Royle point-count occupancy models (OccupRNegBin or OccupRPoisson)? These models require count data and MARK reads in pairs of characters from 00 to 99 for each occasion (i.e., a count of 2 is coded 02). This is clearly described in the Donovan exercise 8 example

>?Donovan.8

However, how would missing values be coded in this paired format? I tried ".." and "." but with no luck. I did read in the forum that PRESENCE allows coding of missing values in the Royle point-count models, so I'm hoping that's the case with MARK and RMark?

Thanks for your help,
Andy
ajpaul
 
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Re: Coding missing values in Royle point-count occupancy mod

Postby gwhite » Tue Jan 24, 2012 3:29 pm

Andy:
I just checked the code, and you should be able to enter a .. for missing data in these models. If you still can't get it to work, send me the inp, dbf, and fpt files, and I'll investigate further.
Gary
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Re: Coding missing values in Royle point-count occupancy mod

Postby ajpaul » Wed Jan 25, 2012 2:46 pm

You are quite right Gary. Missing data is coded as ".." for Royle point-count models in MARK. Looks like the issue is within RMark. The posting is still on the RMark forum so a solution will be posted their once available. Thanks for your help.
Andy
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