{"action":"created","issue":{"url":"https://api.github.com/repos/NOAA-PMEL/Ferret/issues/1099","repository_url":"https://api.github.com/repos/NOAA-PMEL/Ferret","labels_url":"https://api.github.com/repos/NOAA-PMEL/Ferret/issues/1099/labels{/name}","comments_url":"https://api.github.com/repos/NOAA-PMEL/Ferret/issues/1099/comments","events_url":"https://api.github.com/repos/NOAA-PMEL/Ferret/issues/1099/events","html_url":"https://github.com/NOAA-PMEL/Ferret/issues/1099","id":276301715,"number":1099,"title":"Ability to limit variance-based levels, e.g. to positive values","user":{"login":"karlmsmith","id":16406727,"avatar_url":"https://avatars0.githubusercontent.com/u/16406727?v=4","gravatar_id":"","url":"https://api.github.com/users/karlmsmith","html_url":"https://github.com/karlmsmith","followers_url":"https://api.github.com/users/karlmsmith/followers","following_url":"https://api.github.com/users/karlmsmith/following{/other_user}","gists_url":"https://api.github.com/users/karlmsmith/gists{/gist_id}","starred_url":"https://api.github.com/users/karlmsmith/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/karlmsmith/subscriptions","organizations_url":"https://api.github.com/users/karlmsmith/orgs","repos_url":"https://api.github.com/users/karlmsmith/repos","events_url":"https://api.github.com/users/karlmsmith/events{/privacy}","received_events_url":"https://api.github.com/users/karlmsmith/received_events","type":"User","site_admin":false},"labels":[{"id":323826823,"url":"https://api.github.com/repos/NOAA-PMEL/Ferret/labels/enhancement","name":"enhancement","color":"84b6eb","default":true},{"id":757390773,"url":"https://api.github.com/repos/NOAA-PMEL/Ferret/labels/P:%20normal","name":"P: normal","color":"fef2c0","default":false},{"id":758304202,"url":"https://api.github.com/repos/NOAA-PMEL/Ferret/labels/S:%20normal","name":"S: normal","color":"fbca04","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-11-23T08:59:48Z","updated_at":"2017-11-23T08:59:49Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"**Reported by ansley b manke on 5 Apr 2011 19:15 UTC**\nIn LAS we see examples of variables such as rainfall which are just never going to be zero, but where the variance-based color levels are computed that include negative values. Need a syntax to specify a hard limit on one end.\r\n\r\nSee the first image in this question on the LAS users list.\r\nhttp://www.pmel.noaa.gov/maillists/tmap/las_users/fu_2011/msg00044.html\r\n\n\nMigrated-From: http://dunkel.pmel.noaa.gov/trac/ferret/ticket/1827"},"comment":{"url":"https://api.github.com/repos/NOAA-PMEL/Ferret/issues/comments/346561130","html_url":"https://github.com/NOAA-PMEL/Ferret/issues/1099#issuecomment-346561130","issue_url":"https://api.github.com/repos/NOAA-PMEL/Ferret/issues/1099","id":346561130,"user":{"login":"karlmsmith","id":16406727,"avatar_url":"https://avatars0.githubusercontent.com/u/16406727?v=4","gravatar_id":"","url":"https://api.github.com/users/karlmsmith","html_url":"https://github.com/karlmsmith","followers_url":"https://api.github.com/users/karlmsmith/followers","following_url":"https://api.github.com/users/karlmsmith/following{/other_user}","gists_url":"https://api.github.com/users/karlmsmith/gists{/gist_id}","starred_url":"https://api.github.com/users/karlmsmith/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/karlmsmith/subscriptions","organizations_url":"https://api.github.com/users/karlmsmith/orgs","repos_url":"https://api.github.com/users/karlmsmith/repos","events_url":"https://api.github.com/users/karlmsmith/events{/privacy}","received_events_url":"https://api.github.com/users/karlmsmith/received_events","type":"User","site_admin":false},"created_at":"2017-11-23T08:59:49Z","updated_at":"2017-11-23T08:59:49Z","author_association":"CONTRIBUTOR","body":"**Comment by steven.c.hankin on 5 Apr 2011 19:26 UTC**\nReally it is a different concept -- a \"zero&variance\" concept instead of a \"mean&variance\" concept.  (Imagine a Poisson distribution.)\r\n\r\nMaybe use a \"z\"\r\n  o 10c - centered constant levels\r\n  o 10vc - centered variance levels\r\n  o 10vz - zero-ended variance levels \r\n  o 10z - zero-ended constant levels (always positive?  allow \"z+\" and \"z-\")\r\n\r\n"}}
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