{"action":"created","issue":{"url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl/issues/180","repository_url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl","labels_url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl/issues/180/labels{/name}","comments_url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl/issues/180/comments","events_url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl/issues/180/events","html_url":"https://github.com/JuliaDynamics/DynamicalBilliards.jl/pull/180","id":391217085,"node_id":"MDExOlB1bGxSZXF1ZXN0MjM4ODA0MzI0","number":180,"title":"Added initial function for perturbation growth","user":{"login":"lhupe","id":34064555,"node_id":"MDQ6VXNlcjM0MDY0NTU1","avatar_url":"https://avatars2.githubusercontent.com/u/34064555?v=4","gravatar_id":"","url":"https://api.github.com/users/lhupe","html_url":"https://github.com/lhupe","followers_url":"https://api.github.com/users/lhupe/followers","following_url":"https://api.github.com/users/lhupe/following{/other_user}","gists_url":"https://api.github.com/users/lhupe/gists{/gist_id}","starred_url":"https://api.github.com/users/lhupe/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lhupe/subscriptions","organizations_url":"https://api.github.com/users/lhupe/orgs","repos_url":"https://api.github.com/users/lhupe/repos","events_url":"https://api.github.com/users/lhupe/events{/privacy}","received_events_url":"https://api.github.com/users/lhupe/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2018-12-14T18:24:15Z","updated_at":"2018-12-14T18:48:22Z","closed_at":null,"author_association":"CONTRIBUTOR","pull_request":{"url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl/pulls/180","html_url":"https://github.com/JuliaDynamics/DynamicalBilliards.jl/pull/180","diff_url":"https://github.com/JuliaDynamics/DynamicalBilliards.jl/pull/180.diff","patch_url":"https://github.com/JuliaDynamics/DynamicalBilliards.jl/pull/180.patch"},"body":"This PR will add a function `perturbationgrowth` that calculates and returns the time evolution of the perturbation vector associated with a given particle immediately before and after every collision. \r\n\r\n"},"comment":{"url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl/issues/comments/447418269","html_url":"https://github.com/JuliaDynamics/DynamicalBilliards.jl/pull/180#issuecomment-447418269","issue_url":"https://api.github.com/repos/JuliaDynamics/DynamicalBilliards.jl/issues/180","id":447418269,"node_id":"MDEyOklzc3VlQ29tbWVudDQ0NzQxODI2OQ==","user":{"login":"lhupe","id":34064555,"node_id":"MDQ6VXNlcjM0MDY0NTU1","avatar_url":"https://avatars2.githubusercontent.com/u/34064555?v=4","gravatar_id":"","url":"https://api.github.com/users/lhupe","html_url":"https://github.com/lhupe","followers_url":"https://api.github.com/users/lhupe/followers","following_url":"https://api.github.com/users/lhupe/following{/other_user}","gists_url":"https://api.github.com/users/lhupe/gists{/gist_id}","starred_url":"https://api.github.com/users/lhupe/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lhupe/subscriptions","organizations_url":"https://api.github.com/users/lhupe/orgs","repos_url":"https://api.github.com/users/lhupe/repos","events_url":"https://api.github.com/users/lhupe/events{/privacy}","received_events_url":"https://api.github.com/users/lhupe/received_events","type":"User","site_admin":false},"created_at":"2018-12-14T18:48:22Z","updated_at":"2018-12-14T18:48:22Z","author_association":"CONTRIBUTOR","body":"Hmm. I tried to use the email reply feature, but my message appears to be stuck somewhere. Anyway, here it is:\r\n\r\n> You used the word should so I am left wondering: have you tested this or not? \r\n\r\nI'm pretty sure I tested it during my Bachelor project, but that was a\r\nlong time ago. I'll test it again.\r\n\r\n> For the return types: don't you think it would be easier to have each time point doubled (push twice : `push!(tim, tmin + count, tmin + count)` and push the vector before and after in the same return container? This would allow for easier plotting as well, since you could plot like `plot(t, norm.(ret), \"o--\")`.\r\n\r\nI agree with your second point. That was the way I had originally\r\nimplemented it, but I misunderstood your original mail on the output\r\nformat.\r\n\r\n\r\n"}}
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