Hello Distance Sampling Team,
I am trying to estimate abundance and density for pronghorn in our study area. However, I am getting errors with functions ds(), dht() and dht2() when I include column 'size' in my data. 'Size' in this case, is the number of individuals counted in each group detected. I do not get errors when I run the functions without 'size' in the dataframe.
The data are from aerial systematic line transects (attached as dat.RDS) and my code, including errors I get, is simplified and attached as dsDensityEstHelp.r.
I have previously been able to run ds() & dht2() without a problem. All said, I'm a bit embarrassed to ask this question here, and am hoping collective brains might help me troubleshoot!
Please let me know if I can provide further information and thank you, in advance, for your help!
Molly