{"action":"created","issue":{"url":"https://api.github.com/repos/JuliaOpt/Optim.jl/issues/191","repository_url":"https://api.github.com/repos/JuliaOpt/Optim.jl","labels_url":"https://api.github.com/repos/JuliaOpt/Optim.jl/issues/191/labels{/name}","comments_url":"https://api.github.com/repos/JuliaOpt/Optim.jl/issues/191/comments","events_url":"https://api.github.com/repos/JuliaOpt/Optim.jl/issues/191/events","html_url":"https://github.com/JuliaOpt/Optim.jl/pull/191","id":150030445,"number":191,"title":"Modifications and Extension of Preconditioning","user":{"login":"cortner","id":7688515,"avatar_url":"https://avatars.githubusercontent.com/u/7688515?v=3","gravatar_id":"","url":"https://api.github.com/users/cortner","html_url":"https://github.com/cortner","followers_url":"https://api.github.com/users/cortner/followers","following_url":"https://api.github.com/users/cortner/following{/other_user}","gists_url":"https://api.github.com/users/cortner/gists{/gist_id}","starred_url":"https://api.github.com/users/cortner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cortner/subscriptions","organizations_url":"https://api.github.com/users/cortner/orgs","repos_url":"https://api.github.com/users/cortner/repos","events_url":"https://api.github.com/users/cortner/events{/privacy}","received_events_url":"https://api.github.com/users/cortner/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2016-04-21T10:20:01Z","updated_at":"2016-05-10T07:53:57Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/JuliaOpt/Optim.jl/pulls/191","html_url":"https://github.com/JuliaOpt/Optim.jl/pull/191","diff_url":"https://github.com/JuliaOpt/Optim.jl/pull/191.diff","patch_url":"https://github.com/JuliaOpt/Optim.jl/pull/191.patch"},"body":"This was discussed in [Issue 188](https://github.com/JuliaOpt/Optim.jl/issues/188).\r\n\r\n* created `precon.jl`\r\n* added preconditioning to `GradientDescent` and to `LBFGS`\r\n* added `test/precon.jl` to test preconditioning capabilities\r\n* added a matrix preconditioner\r\n\r\nDocumentation has been added in a separate [pull request #190 ](https://github.com/JuliaOpt/Optim.jl/pull/190).\r\n\r\nI think this is just a quick and dirty implementation. I suggest more \r\nsubstantial changes in this direction in [Issue 188](https://github.com/JuliaOpt/Optim.jl/issues/188)."},"comment":{"url":"https://api.github.com/repos/JuliaOpt/Optim.jl/issues/comments/218084351","html_url":"https://github.com/JuliaOpt/Optim.jl/pull/191#issuecomment-218084351","issue_url":"https://api.github.com/repos/JuliaOpt/Optim.jl/issues/191","id":218084351,"user":{"login":"cortner","id":7688515,"avatar_url":"https://avatars.githubusercontent.com/u/7688515?v=3","gravatar_id":"","url":"https://api.github.com/users/cortner","html_url":"https://github.com/cortner","followers_url":"https://api.github.com/users/cortner/followers","following_url":"https://api.github.com/users/cortner/following{/other_user}","gists_url":"https://api.github.com/users/cortner/gists{/gist_id}","starred_url":"https://api.github.com/users/cortner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cortner/subscriptions","organizations_url":"https://api.github.com/users/cortner/orgs","repos_url":"https://api.github.com/users/cortner/repos","events_url":"https://api.github.com/users/cortner/events{/privacy}","received_events_url":"https://api.github.com/users/cortner/received_events","type":"User","site_admin":false},"created_at":"2016-05-10T07:53:57Z","updated_at":"2016-05-10T07:53:57Z","body":"From @timholy 's perspective the only change is the move of the preconditioner code to `precon.jl`."}}