Error writeShapefile.ctmm not found

[adrian...@gmail.com]

Hi Chris,

I am trying to create shapefiles from a list with akde UD. I am getting the error pasted below. My list has 151 akde UD and this error pops up in individual 55. 

for(i in 1:length(tv.nonbreeding)){
writeShapefile(V.AKDE.nonbreeding[[i]],folder=getwd(),file=paste(names(tv.nonbreeding)[i]),level.UD=0.95)
}

Error in utils::getS3method("writeShapefile", CLASS) :
  S3 method 'writeShapefile.ctmm' not found
In addition: There were 20 warnings (use warnings() to see them)

I am sending a subset of the data where the error is occurring. Any guess what could be happening here? Thanks for the help. All the best,

Adrian

[Christen Fleming]

Hi Adrian,

The second element is not a UD object:

> sapply(V.AKDE.nonbreeding,class)
[1] "UD"   "list" "UD"   "UD"   "UD"   "UD"   "UD" 

It appears to be a list with one ctmm object of zero variance. The list aside, if you put a "bad" model like this into akde() then it will just spit the model back out, as that can still be used equivalently for some functions like summary(). I have not written a writeShapefile method for ctmm objects, but in this case there's no valid shapefile that could be calculated.

Best,

Chris