GAM parameters: Biomod 2

Hello,

I am using Biomod 2 to modelling species distribution. I ran some
algorithms like GAM, GLM, RF and CTA.

I did not change the parameters. How can I known the quadratic terms of GAM?


I used the variables with form linear (e.g.  precipitation, altimetry,
temperature) I did not use temperature ^2.


Any suggestions?

Regards,


Lara






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