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change kernel? #71

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dodgejesse opened this issue Feb 1, 2018 · 0 comments
Open

change kernel? #71

dodgejesse opened this issue Feb 1, 2018 · 0 comments

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@dodgejesse
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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!

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