{"action":"created","issue":{"url":"https://api.github.com/repos/altair-viz/altair/issues/902","repository_url":"https://api.github.com/repos/altair-viz/altair","labels_url":"https://api.github.com/repos/altair-viz/altair/issues/902/labels{/name}","comments_url":"https://api.github.com/repos/altair-viz/altair/issues/902/comments","events_url":"https://api.github.com/repos/altair-viz/altair/issues/902/events","html_url":"https://github.com/altair-viz/altair/issues/902","id":326962849,"number":902,"title":"Cumulative histogram","user":{"login":"hugo-pires","id":7768784,"avatar_url":"https://avatars1.githubusercontent.com/u/7768784?v=4","gravatar_id":"","url":"https://api.github.com/users/hugo-pires","html_url":"https://github.com/hugo-pires","followers_url":"https://api.github.com/users/hugo-pires/followers","following_url":"https://api.github.com/users/hugo-pires/following{/other_user}","gists_url":"https://api.github.com/users/hugo-pires/gists{/gist_id}","starred_url":"https://api.github.com/users/hugo-pires/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hugo-pires/subscriptions","organizations_url":"https://api.github.com/users/hugo-pires/orgs","repos_url":"https://api.github.com/users/hugo-pires/repos","events_url":"https://api.github.com/users/hugo-pires/events{/privacy}","received_events_url":"https://api.github.com/users/hugo-pires/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":5,"created_at":"2018-05-28T09:36:02Z","updated_at":"2018-05-28T21:49:33Z","closed_at":null,"author_association":"NONE","body":"Hello\r\n\r\nIs it possible to have \"cumsum\" operator that I can use together with bining to produce a cumulative histogram?\r\n\r\nThank you"},"comment":{"url":"https://api.github.com/repos/altair-viz/altair/issues/comments/392608157","html_url":"https://github.com/altair-viz/altair/issues/902#issuecomment-392608157","issue_url":"https://api.github.com/repos/altair-viz/altair/issues/902","id":392608157,"user":{"login":"palewire","id":9993,"avatar_url":"https://avatars1.githubusercontent.com/u/9993?v=4","gravatar_id":"","url":"https://api.github.com/users/palewire","html_url":"https://github.com/palewire","followers_url":"https://api.github.com/users/palewire/followers","following_url":"https://api.github.com/users/palewire/following{/other_user}","gists_url":"https://api.github.com/users/palewire/gists{/gist_id}","starred_url":"https://api.github.com/users/palewire/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/palewire/subscriptions","organizations_url":"https://api.github.com/users/palewire/orgs","repos_url":"https://api.github.com/users/palewire/repos","events_url":"https://api.github.com/users/palewire/events{/privacy}","received_events_url":"https://api.github.com/users/palewire/received_events","type":"User","site_admin":false},"created_at":"2018-05-28T21:49:33Z","updated_at":"2018-05-28T21:49:33Z","author_association":"CONTRIBUTOR","body":"It seems to me that there is a need for a very simple cumulative total example in our line charts.\r\n\r\nAt my day job at the Los Angeles Times, I edited [a story](http://www.latimes.com/politics/la-pol-ca-antonio-villaraigosa-charter-school-money-governor-20180514-story.html) a few weeks ago only the flood of \"Super PAC\" money rushing into California's looming primary for governor.\r\n\r\nHere's a chart that ran with that story.\r\n\r\n![](http://www.trbimg.com/img-5afb43c9/turbine/la-ca-pol-g-villaraigosa-pac-money-20180515/)\r\n\r\nIf there's not a good data set in vega_datasets currently for a \"cumsum\" line chart, this could make a good candidate. It's small, it's simple, it clearly fits the example. "}}
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