Data cloning and individual covariates

questions concerning analysis/theory using program MARK

Data cloning and individual covariates

Postby Eurycea » Wed Jun 12, 2024 5:26 pm

Is there any reason why Mark's data cloning feature would not work with an individual covariate dataset?

The great book says on 11-4
in order to use individual covariate data, you
must include the encounter history for each individual in the data file – you can’t summarize your data
by calculating the frequency of each encounter history as you may have done earlier (see Chapter 2 for
the basic concepts if you’re unsure). Each line of the .INP file contains an individual encounter history.
The encounter history is followed immediately by a single digit ‘1’, to indicate that the frequency of this
individual history is 1 (or, that each line of data in the .INP file corresponds to 1 individual).


However, I assume this is just a matter of practical function for most cases and not a mathematical necessity. Because, I assume with data cloning, we would just change that 1 to 100 (for example) and run the same model.

Ditto same question, but for time-varying individual covariates.

I had some unexpected results using RDHuggins data where all the detection estimates were super wonky, so I'm just chasing this down. I used time-varying binary size data as a function of p. Thanks!
Eurycea
 
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Re: Data cloning and individual covariates

Postby gwhite » Thu Jun 13, 2024 10:17 am

No reason that data cloning will not work with either individual or time-varying covariates. Maybe you should try an example without "wonky" estimates to verify you are doing the analysis correctly.
gwhite
 
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Re: Data cloning and individual covariates

Postby Eurycea » Thu Jun 13, 2024 11:23 am

Thanks for the confirmation Gary!

I will proceed as you suggested.
Eurycea
 
Posts: 103
Joined: Thu Feb 25, 2010 11:21 am


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