{"action":"created","issue":{"url":"https://api.github.com/repos/topepo/parsnip/issues/10","repository_url":"https://api.github.com/repos/topepo/parsnip","labels_url":"https://api.github.com/repos/topepo/parsnip/issues/10/labels{/name}","comments_url":"https://api.github.com/repos/topepo/parsnip/issues/10/comments","events_url":"https://api.github.com/repos/topepo/parsnip/issues/10/events","html_url":"https://github.com/topepo/parsnip/issues/10","id":296598352,"node_id":"MDU6SXNzdWUyOTY1OTgzNTI=","number":10,"title":"determine convention for available data characteristics","user":{"login":"topepo","id":5731043,"node_id":"MDQ6VXNlcjU3MzEwNDM=","avatar_url":"https://avatars1.githubusercontent.com/u/5731043?v=4","gravatar_id":"","url":"https://api.github.com/users/topepo","html_url":"https://github.com/topepo","followers_url":"https://api.github.com/users/topepo/followers","following_url":"https://api.github.com/users/topepo/following{/other_user}","gists_url":"https://api.github.com/users/topepo/gists{/gist_id}","starred_url":"https://api.github.com/users/topepo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/topepo/subscriptions","organizations_url":"https://api.github.com/users/topepo/orgs","repos_url":"https://api.github.com/users/topepo/repos","events_url":"https://api.github.com/users/topepo/events{/privacy}","received_events_url":"https://api.github.com/users/topepo/received_events","type":"User","site_admin":false},"labels":[{"id":835740434,"node_id":"MDU6TGFiZWw4MzU3NDA0MzQ=","url":"https://api.github.com/repos/topepo/parsnip/labels/discussion","name":"discussion","color":"e8a281","default":false}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-02-13T03:00:51Z","updated_at":"2018-07-30T00:53:19Z","closed_at":"2018-07-30T00:53:19Z","author_association":"OWNER","body":"When `fit` is called, there will be a need to pass _unevaluated_ arguments to the fit function. For example, someone might want to use:\r\n\r\n```\r\nrand_forest(mtry = expr(floor(sqrt(ncol(x)))))\r\n```\r\n\r\nbut `x` might not exist when this expression is evaluated. \r\n\r\nThere should be a standard set of objects that are guaranteed to be available at the time of fit, such as:\r\n\r\n* number of columns\r\n* number of row\r\n* minimum and maximum class sizes\r\n\r\nThis will need to be _well documented_; the number of columns depends on whether dummy variables have been created or not. As such, this might vary depending on how the data are exposed via `fit`. \r\n\r\nPerhaps variables such as `.n`, `.p` and others could be used so that\r\n```\r\nrand_forest(mtry = expr(floor(sqrt(.p))))\r\n```\r\nwould work. \r\n\r\n"},"comment":{"url":"https://api.github.com/repos/topepo/parsnip/issues/comments/408718894","html_url":"https://github.com/topepo/parsnip/issues/10#issuecomment-408718894","issue_url":"https://api.github.com/repos/topepo/parsnip/issues/10","id":408718894,"node_id":"MDEyOklzc3VlQ29tbWVudDQwODcxODg5NA==","user":{"login":"topepo","id":5731043,"node_id":"MDQ6VXNlcjU3MzEwNDM=","avatar_url":"https://avatars1.githubusercontent.com/u/5731043?v=4","gravatar_id":"","url":"https://api.github.com/users/topepo","html_url":"https://github.com/topepo","followers_url":"https://api.github.com/users/topepo/followers","following_url":"https://api.github.com/users/topepo/following{/other_user}","gists_url":"https://api.github.com/users/topepo/gists{/gist_id}","starred_url":"https://api.github.com/users/topepo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/topepo/subscriptions","organizations_url":"https://api.github.com/users/topepo/orgs","repos_url":"https://api.github.com/users/topepo/repos","events_url":"https://api.github.com/users/topepo/events{/privacy}","received_events_url":"https://api.github.com/users/topepo/received_events","type":"User","site_admin":false},"created_at":"2018-07-30T00:53:19Z","updated_at":"2018-07-30T00:53:19Z","author_association":"OWNER","body":"descriptors have been added"}}
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