{"action":"created","issue":{"url":"https://api.github.com/repos/trthatcher/MLKernels.jl/issues/22","labels_url":"https://api.github.com/repos/trthatcher/MLKernels.jl/issues/22/labels{/name}","comments_url":"https://api.github.com/repos/trthatcher/MLKernels.jl/issues/22/comments","events_url":"https://api.github.com/repos/trthatcher/MLKernels.jl/issues/22/events","html_url":"https://github.com/trthatcher/MLKernels.jl/issues/22","id":80869529,"number":22,"title":"GammaRationalQuadraticKernel parameters","user":{"login":"st--","id":5763727,"avatar_url":"https://avatars.githubusercontent.com/u/5763727?v=3","gravatar_id":"","url":"https://api.github.com/users/st--","html_url":"https://github.com/st--","followers_url":"https://api.github.com/users/st--/followers","following_url":"https://api.github.com/users/st--/following{/other_user}","gists_url":"https://api.github.com/users/st--/gists{/gist_id}","starred_url":"https://api.github.com/users/st--/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/st--/subscriptions","organizations_url":"https://api.github.com/users/st--/orgs","repos_url":"https://api.github.com/users/st--/repos","events_url":"https://api.github.com/users/st--/events{/privacy}","received_events_url":"https://api.github.com/users/st--/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-05-26T09:00:49Z","updated_at":"2015-05-26T13:27:09Z","closed_at":null,"body":"So GammaRationalQuadraticKernel(alpha,beta,gamma) is a generalised form of the RationalQuadraticKernel(alpha,beta) is a generalised form of the InverseQuadraticKernel(alpha).\r\nInverseQuadraticKernel(alpha) = RationalQuadraticKernel(alpha,beta=1), and\r\nRationalQuadraticKernel(alpha,beta) = GammaRationalQuadraticKernel(alpha,beta,gamma=1).\r\nBut the default value of GammaRationalQuadraticKernel is gamma=0.5. Just checking if that is intentional?"},"comment":{"url":"https://api.github.com/repos/trthatcher/MLKernels.jl/issues/comments/105523941","html_url":"https://github.com/trthatcher/MLKernels.jl/issues/22#issuecomment-105523941","issue_url":"https://api.github.com/repos/trthatcher/MLKernels.jl/issues/22","id":105523941,"user":{"login":"st--","id":5763727,"avatar_url":"https://avatars.githubusercontent.com/u/5763727?v=3","gravatar_id":"","url":"https://api.github.com/users/st--","html_url":"https://github.com/st--","followers_url":"https://api.github.com/users/st--/followers","following_url":"https://api.github.com/users/st--/following{/other_user}","gists_url":"https://api.github.com/users/st--/gists{/gist_id}","starred_url":"https://api.github.com/users/st--/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/st--/subscriptions","organizations_url":"https://api.github.com/users/st--/orgs","repos_url":"https://api.github.com/users/st--/repos","events_url":"https://api.github.com/users/st--/events{/privacy}","received_events_url":"https://api.github.com/users/st--/received_events","type":"User","site_admin":false},"created_at":"2015-05-26T13:27:09Z","updated_at":"2015-05-26T13:27:09Z","body":"I don't know; I mean, if you supply a default value, there must be some thought in there - if there's no reason to pick any default value, it'd be better to leave it out - I think it's fine to leave it as is e.g. if both gamma=0.5 and gamma=1.0 are the two most-often used cases, then people can simply use GammaRationalQuadratic() and RationalQuadratic(), respectively... Depends a bit on whether you think of it as just providing optimised (hard-coded) versions for special cases of the parameters, or whether it's providing different often-used variants?"}}