{"action":"created","issue":{"url":"https://api.github.com/repos/bambinos/bambi/issues/30","repository_url":"https://api.github.com/repos/bambinos/bambi","labels_url":"https://api.github.com/repos/bambinos/bambi/issues/30/labels{/name}","comments_url":"https://api.github.com/repos/bambinos/bambi/issues/30/comments","events_url":"https://api.github.com/repos/bambinos/bambi/issues/30/events","html_url":"https://github.com/bambinos/bambi/issues/30","id":173655972,"number":30,"title":"Add informative message when prior scaling fails due to non-identifiable fixed 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full working release--must be complete by submission of 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a model with default priors and non-identifiable fixed effects is created (e.g., by calling something like `add_term('condition', drop_first=False)` when an intercept is already in the model), the prior scaling approach currently implemented in `PriorScaler` sets the random factor hyperprior variances to `inf`, and the sampler consequently refuses to start. We should either check for this scenario and substitute some large but sane value, or raise an exception with a more informative message rather than waiting for Theano to complain."},"comment":{"url":"https://api.github.com/repos/bambinos/bambi/issues/comments/243002153","html_url":"https://github.com/bambinos/bambi/issues/30#issuecomment-243002153","issue_url":"https://api.github.com/repos/bambinos/bambi/issues/30","id":243002153,"user":{"login":"jake-westfall","id":4605713,"avatar_url":"https://avatars.githubusercontent.com/u/4605713?v=3","gravatar_id":"","url":"https://api.github.com/users/jake-westfall","html_url":"https://github.com/jake-westfall","followers_url":"https://api.github.com/users/jake-westfall/followers","following_url":"https://api.github.com/users/jake-westfall/following{/other_user}","gists_url":"https://api.github.com/users/jake-westfall/gists{/gist_id}","starred_url":"https://api.github.com/users/jake-westfall/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jake-westfall/subscriptions","organizations_url":"https://api.github.com/users/jake-westfall/orgs","repos_url":"https://api.github.com/users/jake-westfall/repos","events_url":"https://api.github.com/users/jake-westfall/events{/privacy}","received_events_url":"https://api.github.com/users/jake-westfall/received_events","type":"User","site_admin":false},"created_at":"2016-08-28T21:59:48Z","updated_at":"2016-08-28T21:59:48Z","body":"Cool. I hadn't run across the `concat` error, do you have an example of a model that was tripped up by this? I haven't had any issues with models with multiple fixed effects, including some models I just tested with multiple categorical predictors each with >2 levels (i.e., fixed-effect ANOVA models)."}}
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