{"action":"created","issue":{"url":"https://api.github.com/repos/jeff-regier/Celeste.jl/issues/490","repository_url":"https://api.github.com/repos/jeff-regier/Celeste.jl","labels_url":"https://api.github.com/repos/jeff-regier/Celeste.jl/issues/490/labels{/name}","comments_url":"https://api.github.com/repos/jeff-regier/Celeste.jl/issues/490/comments","events_url":"https://api.github.com/repos/jeff-regier/Celeste.jl/issues/490/events","html_url":"https://github.com/jeff-regier/Celeste.jl/issues/490","id":196986742,"number":490,"title":"test that joint inference improves the elbo for `validate_on_stripe82.jl`","user":{"login":"jeff-regier","id":8953355,"avatar_url":"https://avatars.githubusercontent.com/u/8953355?v=3","gravatar_id":"","url":"https://api.github.com/users/jeff-regier","html_url":"https://github.com/jeff-regier","followers_url":"https://api.github.com/users/jeff-regier/followers","following_url":"https://api.github.com/users/jeff-regier/following{/other_user}","gists_url":"https://api.github.com/users/jeff-regier/gists{/gist_id}","starred_url":"https://api.github.com/users/jeff-regier/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jeff-regier/subscriptions","organizations_url":"https://api.github.com/users/jeff-regier/orgs","repos_url":"https://api.github.com/users/jeff-regier/repos","events_url":"https://api.github.com/users/jeff-regier/events{/privacy}","received_events_url":"https://api.github.com/users/jeff-regier/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"agnusmaximus","id":1736160,"avatar_url":"https://avatars.githubusercontent.com/u/1736160?v=3","gravatar_id":"","url":"https://api.github.com/users/agnusmaximus","html_url":"https://github.com/agnusmaximus","followers_url":"https://api.github.com/users/agnusmaximus/followers","following_url":"https://api.github.com/users/agnusmaximus/following{/other_user}","gists_url":"https://api.github.com/users/agnusmaximus/gists{/gist_id}","starred_url":"https://api.github.com/users/agnusmaximus/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/agnusmaximus/subscriptions","organizations_url":"https://api.github.com/users/agnusmaximus/orgs","repos_url":"https://api.github.com/users/agnusmaximus/repos","events_url":"https://api.github.com/users/agnusmaximus/events{/privacy}","received_events_url":"https://api.github.com/users/agnusmaximus/received_events","type":"User","site_admin":false},"assignees":[{"login":"agnusmaximus","id":1736160,"avatar_url":"https://avatars.githubusercontent.com/u/1736160?v=3","gravatar_id":"","url":"https://api.github.com/users/agnusmaximus","html_url":"https://github.com/agnusmaximus","followers_url":"https://api.github.com/users/agnusmaximus/followers","following_url":"https://api.github.com/users/agnusmaximus/following{/other_user}","gists_url":"https://api.github.com/users/agnusmaximus/gists{/gist_id}","starred_url":"https://api.github.com/users/agnusmaximus/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/agnusmaximus/subscriptions","organizations_url":"https://api.github.com/users/agnusmaximus/orgs","repos_url":"https://api.github.com/users/agnusmaximus/repos","events_url":"https://api.github.com/users/agnusmaximus/events{/privacy}","received_events_url":"https://api.github.com/users/agnusmaximus/received_events","type":"User","site_admin":false}],"milestone":null,"comments":2,"created_at":"2016-12-21T17:16:55Z","updated_at":"2016-12-27T15:35:16Z","closed_at":null,"body":""},"comment":{"url":"https://api.github.com/repos/jeff-regier/Celeste.jl/issues/comments/269341242","html_url":"https://github.com/jeff-regier/Celeste.jl/issues/490#issuecomment-269341242","issue_url":"https://api.github.com/repos/jeff-regier/Celeste.jl/issues/490","id":269341242,"user":{"login":"jeff-regier","id":8953355,"avatar_url":"https://avatars.githubusercontent.com/u/8953355?v=3","gravatar_id":"","url":"https://api.github.com/users/jeff-regier","html_url":"https://github.com/jeff-regier","followers_url":"https://api.github.com/users/jeff-regier/followers","following_url":"https://api.github.com/users/jeff-regier/following{/other_user}","gists_url":"https://api.github.com/users/jeff-regier/gists{/gist_id}","starred_url":"https://api.github.com/users/jeff-regier/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jeff-regier/subscriptions","organizations_url":"https://api.github.com/users/jeff-regier/orgs","repos_url":"https://api.github.com/users/jeff-regier/repos","events_url":"https://api.github.com/users/jeff-regier/events{/privacy}","received_events_url":"https://api.github.com/users/jeff-regier/received_events","type":"User","site_admin":false},"created_at":"2016-12-27T15:35:16Z","updated_at":"2016-12-27T15:35:16Z","body":"There might be two things going on here. First, these parameters may have different scales, so \"close to zero\" means different things for different parameters. Think of the function `x^2 + 1000000y^2`. At `(0.001, 0.001)` we're pretty close to the minimum, but the partial derivative wrt `y` is much greater. \r\n\r\nYou might try adjusting for the scales of the parameters by dividing the gradient by the diagonal of the Hessian. That rescaled vector should be near 0.\r\n\r\nSecond, I notice that light source 3 is much farther from 0 for some partial derivatives. Could there be a bug? If so, it'll be easier to track it down once you're adjusting for the scales of the parameters."}}
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