{"action":"closed","issue":{"url":"https://api.github.com/repos/cboettig/gpmanagement/issues/4","labels_url":"https://api.github.com/repos/cboettig/gpmanagement/issues/4/labels{/name}","comments_url":"https://api.github.com/repos/cboettig/gpmanagement/issues/4/comments","events_url":"https://api.github.com/repos/cboettig/gpmanagement/issues/4/events","html_url":"https://github.com/cboettig/gpmanagement/issues/4","id":98856127,"number":4,"title":"Appropriate non-dimensionalization / scaling for data","user":{"login":"cboettig","id":222586,"avatar_url":"https://avatars.githubusercontent.com/u/222586?v=3","gravatar_id":"","url":"https://api.github.com/users/cboettig","html_url":"https://github.com/cboettig","followers_url":"https://api.github.com/users/cboettig/followers","following_url":"https://api.github.com/users/cboettig/following{/other_user}","gists_url":"https://api.github.com/users/cboettig/gists{/gist_id}","starred_url":"https://api.github.com/users/cboettig/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cboettig/subscriptions","organizations_url":"https://api.github.com/users/cboettig/orgs","repos_url":"https://api.github.com/users/cboettig/repos","events_url":"https://api.github.com/users/cboettig/events{/privacy}","received_events_url":"https://api.github.com/users/cboettig/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":10,"created_at":"2015-08-03T23:24:05Z","updated_at":"2015-09-03T17:45:25Z","closed_at":"2015-09-03T17:45:25Z","body":"We should decide on how we handle scaling the any data so that results are comparable.  For instance, here are the estimates from two otherwise identical simulations, scaled to carrying capacity of 10 vs 100, showing significantly different length scales:\r\n\r\n![](https://github.com/cboettig/gpmanagement/blob/master/inst/notes/non-dimensionalization_files/figure-markdown_github/unnamed-chunk-7-1.png)\r\n\r\n![](https://github.com/cboettig/gpmanagement/raw/master/inst/notes/non-dimensionalization_files/figure-markdown_github/unnamed-chunk-11-1.png)\r\n\r\nThis doesn't appear to be due to carry over influence of the prior on the length-scale -- indeed I attempt to bias the prior intentionally to the opposite direction (smaller length scale in the first, longer in the second), but this appears to have very little effect.  The length scale is a bit longer in absolute terms in the second case (~20 instead of ~10), but relative to the data that's much shorter, giving the GP mean prior of 0 a much stronger effect.  \r\n\r\nReproducible example here. https://github.com/cboettig/gpmanagement/blob/6781f3414bdce15e1a608a48705eb080ef80d825/inst/notes/non-dimensionalization.md\r\n\r\n@danielturek thoughts?"}}