Hi everybody! I am trying to do cross-validation within my stan model. I haven’t found any method to do that on its own (rstanarm has it, but I rather want to have it in the model itself) - is there anything else? The first question is about indexing. In Stan I can use int arrays for indexing li…

[image] felixmueller: can I somehow exclude certain indices? No, except by constructing a complimentary set of indices [image] felixmueller: Or can I index with a condition? Not easily [image] felixmueller: Can I use one element multiple times on the left side of a tilde? Yes

CV - indexing and multiple tilde assignment

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felixmueller October 5, 2017, 2:21pm 3

Fantastic, thanks so much!
I will have to construct the not_group_k index sets then.

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CV - indexing and multiple tilde assignment

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