This repo contains an example view plugin for snorkel. It lets one create their own view (visualization + controls) for any snorkel query type. To use this plugin , clone it into app/plugins/ of your snorkel data directory.
To enable view plugins, they have to be mapped to the datasets that will use them. Check out the snorkel-dataset-config repository to see how to enable views for all datasets or on a per dataset basis.
Area view is a stream graph view from nvd3. This is a simple example of how to override the options in an already used view in snorkel.
This plugin needs to be cloned as "snorkel-plugins-demo" into app/plugins, since there are references (loading stylesheets and loading the view on demand) that require this convention.