'obs' not found during abund.estim

[Kristin Ross]

Hi,

I've been running this chunk and getting the following error:

> BRSPBySite <- abundEstim(dfunc=BRSP.dfunc.hn,

+                       detectionData=BRSP,

+                       siteData=SiteData,

+                       bySite=TRUE,  # TRUE here provides site-level estimates

+                       area=10000, ci=NULL)

Error in eval(predvars, data, env) : object 'obs' not found

After looking at Rdocumentation.org I can't determine why this is happening, it seems the 'obs' isn't required for this function?

[Eric Rexstad]

Kristin

I'm afraid the `abundEstim` function is in the Rdistance package.  I don't have much experience with the Rdistance package as it is maintained by West Inc.

If I had to make a guess about the cause of the problem, I might wonder if `obs` is a covariate that you have included in your detection function model but that does not exist in the SideData data frame.

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Eric Rexstad
Centre for Ecological and Environmental Modelling
University of St Andrews
St Andrews is a charity registered in Scotland SC013532