change kernel?

[dodgejesse]

I'd like to use an RBF (aka squared exponential, or gaussian) kernel, but I'm not sure how. I know that the Matern kernel is a generalization of the RBF kernel, and that as v -> infinity it becomes the RBF kernel (from here), but I don't see an option for this in Spearmint. I'm also not quite sure how the Matern52 or Matern32 methods work in spearmint/spearmint/gp.py, so I'm not sure how to replace them with an RBF kernel. For example, what are the grad_Matern*2 methods they call for?

Thanks!