https://r-forge.r-project.org/scm/viewvc.php/*checkout*/pkg/biomod2/inst/doc/Simple_species_modelling.pdf?revision=541&root=biomod

Sorry Firoz, i've looked at that tute, and quite a few others, and you'll have to point out where it answers my question, because I can't see it.

Dear Shaun, I don't know a way to do it with biomod2 but it is doable with the dismo package.

Hope it helps!

That's a good Idea Sacha. Shall give it a go. I have found a kind of way of doing this in biomod2 and that's by extracting values from the bias layer to presences and pseudo-absences as a vector and using that vector in the yweights function.  I can also include the surrogate species presences (from which the bias layer was constructed) as absences in the model as well. 

Cheers

Hi Shaun, could you please share the script you mention to extract values from the bias layer to pseudo-absences and presences in biomod2?

Kindly,

Steven G.

Hi Steven

Please find script below. Some lines are blocked off and I can't remember if the values are correct as I was last using this about a year ago. In practice I ended up creating a bias layer from selected psuedo absences and running the bias layer in MaxEnt Article Applying surrogate species presences to correct sample bias ...

Cheers

Shaun

# 1. Formatting Data

myBiomodData

Hi Shaun,

Thanks so much!