{"action":"opened","issue":{"url":"https://api.github.com/repos/mattwescott/senmf/issues/1","labels_url":"https://api.github.com/repos/mattwescott/senmf/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/mattwescott/senmf/issues/1/comments","events_url":"https://api.github.com/repos/mattwescott/senmf/issues/1/events","html_url":"https://github.com/mattwescott/senmf/issues/1","id":68823331,"number":1,"title":"Improve initialization","user":{"login":"mattwescott","id":863268,"avatar_url":"https://avatars.githubusercontent.com/u/863268?v=3","gravatar_id":"","url":"https://api.github.com/users/mattwescott","html_url":"https://github.com/mattwescott","followers_url":"https://api.github.com/users/mattwescott/followers","following_url":"https://api.github.com/users/mattwescott/following{/other_user}","gists_url":"https://api.github.com/users/mattwescott/gists{/gist_id}","starred_url":"https://api.github.com/users/mattwescott/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mattwescott/subscriptions","organizations_url":"https://api.github.com/users/mattwescott/orgs","repos_url":"https://api.github.com/users/mattwescott/repos","events_url":"https://api.github.com/users/mattwescott/events{/privacy}","received_events_url":"https://api.github.com/users/mattwescott/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mattwescott/senmf/labels/enhancement","name":"enhancement","color":"84b6eb"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-04-16T01:32:10Z","updated_at":"2015-04-16T01:32:10Z","closed_at":null,"body":"Both the activations and dictionaries are initialized randomly, and only once. Better initialization would decrease the number of iterations necessary. Furthermore, because the model is non-convex, it could also improve the final performance. \r\n\r\nOne recommended strategy is to start with many initializations, and prune them based on convergence speed. "}}