{"action":"created","issue":{"url":"https://api.github.com/repos/pymc-devs/pymc3/issues/691","labels_url":"https://api.github.com/repos/pymc-devs/pymc3/issues/691/labels{/name}","comments_url":"https://api.github.com/repos/pymc-devs/pymc3/issues/691/comments","events_url":"https://api.github.com/repos/pymc-devs/pymc3/issues/691/events","html_url":"https://github.com/pymc-devs/pymc3/issues/691","id":61073790,"number":691,"title":"Specify mean for GaussianRandomWalk innovations","user":{"login":"akuz","id":2409854,"avatar_url":"https://avatars.githubusercontent.com/u/2409854?v=3","gravatar_id":"","url":"https://api.github.com/users/akuz","html_url":"https://github.com/akuz","followers_url":"https://api.github.com/users/akuz/followers","following_url":"https://api.github.com/users/akuz/following{/other_user}","gists_url":"https://api.github.com/users/akuz/gists{/gist_id}","starred_url":"https://api.github.com/users/akuz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/akuz/subscriptions","organizations_url":"https://api.github.com/users/akuz/orgs","repos_url":"https://api.github.com/users/akuz/repos","events_url":"https://api.github.com/users/akuz/events{/privacy}","received_events_url":"https://api.github.com/users/akuz/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-03-13T14:18:41Z","updated_at":"2015-12-16T18:48:51Z","closed_at":"2015-04-06T08:02:34Z","body":"Currently there is no way to specify mean for GaussianRandomWalk innovations (just hard coded to zero in the code)."},"comment":{"url":"https://api.github.com/repos/pymc-devs/pymc3/issues/comments/165208927","html_url":"https://github.com/pymc-devs/pymc3/issues/691#issuecomment-165208927","issue_url":"https://api.github.com/repos/pymc-devs/pymc3/issues/691","id":165208927,"user":{"login":"akuz","id":2409854,"avatar_url":"https://avatars.githubusercontent.com/u/2409854?v=3","gravatar_id":"","url":"https://api.github.com/users/akuz","html_url":"https://github.com/akuz","followers_url":"https://api.github.com/users/akuz/followers","following_url":"https://api.github.com/users/akuz/following{/other_user}","gists_url":"https://api.github.com/users/akuz/gists{/gist_id}","starred_url":"https://api.github.com/users/akuz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/akuz/subscriptions","organizations_url":"https://api.github.com/users/akuz/orgs","repos_url":"https://api.github.com/users/akuz/repos","events_url":"https://api.github.com/users/akuz/events{/privacy}","received_events_url":"https://api.github.com/users/akuz/received_events","type":"User","site_admin":false},"created_at":"2015-12-16T18:48:51Z","updated_at":"2015-12-16T18:48:51Z","body":"You could enable the drift like this:\r\n\r\n$$x_t \\sim \\mathcal{N}(x_{t-1} + m, \\sigma)$$\r\n\r\nwhere the variable $$m$$ would be the common drift (same as parameter sigma)."}}