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ConFooBio / gmse

An R package for simulating Generalised Management Strategy Evaluation
http://confoobio.github.io/gmse
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Observation estimate understimates real population size #27

Closed bradduthie closed 7 years ago

bradduthie commented 7 years ago

The case 0 observation type is consistently underestimating the true population size. This could be caused by a calculation that assumes that the size of the sampled area is larger than it actually is, or that the size of the landscape is smaller than it actually is; either way, the observation.c file needs to be double-checked and potentially debugged.

bradduthie commented 7 years ago

The start column (and, because observation column number equals times observed, the end column) was specified incorrectly in the density and mark-recapture estimates in R. This meant that three columns were sampled with values all equaling zero, and three columns were not sampled with values equaling one and zero, to estimate population size. Hence, this produced an underestimate of population size in plots. The issue has now been resolved.