{"action":"closed","issue":{"url":"https://api.github.com/repos/CSTR-Edinburgh/mlpractical/issues/18","labels_url":"https://api.github.com/repos/CSTR-Edinburgh/mlpractical/issues/18/labels{/name}","comments_url":"https://api.github.com/repos/CSTR-Edinburgh/mlpractical/issues/18/comments","events_url":"https://api.github.com/repos/CSTR-Edinburgh/mlpractical/issues/18/events","html_url":"https://github.com/CSTR-Edinburgh/mlpractical/issues/18","id":111893627,"number":18,"title":"01_Linear_Models Exercise 4 MSE or SSE?","user":{"login":"kungfujam","id":3524723,"avatar_url":"https://avatars.githubusercontent.com/u/3524723?v=3","gravatar_id":"","url":"https://api.github.com/users/kungfujam","html_url":"https://github.com/kungfujam","followers_url":"https://api.github.com/users/kungfujam/followers","following_url":"https://api.github.com/users/kungfujam/following{/other_user}","gists_url":"https://api.github.com/users/kungfujam/gists{/gist_id}","starred_url":"https://api.github.com/users/kungfujam/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kungfujam/subscriptions","organizations_url":"https://api.github.com/users/kungfujam/orgs","repos_url":"https://api.github.com/users/kungfujam/repos","events_url":"https://api.github.com/users/kungfujam/events{/privacy}","received_events_url":"https://api.github.com/users/kungfujam/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-10-16T19:13:08Z","updated_at":"2015-10-19T11:28:45Z","closed_at":"2015-10-19T11:28:45Z","body":"Equation (5) shows *sum* of squared errors:\r\n\r\n    (5) $\r\n    E = \\frac{1}{2} \\sum_{n=1}^N ||\\mathbf{y}^n - \\mathbf{t}^n||^2 =  \\sum_{n=1}^N E^n \\\\\r\n      E^n = \\frac{1}{2} ||\\mathbf{y}^n - \\mathbf{t}^n||^2\r\n    $\r\n\r\nText states it is the *mean* squared error. It's implemented as the mean squared error in the solutions to exercise below. "}}