Tracking an event with Segment IO, and displaying a chart of each user's usage stats to that user.

application.js

// Add the following line:
//= require ./keentivate/index.js

// Before the line:
//= require_tree .

chart.html.erb

<div class="keentivate"
data-keen-type="line"
data-keen-event="Used Feature X"
data-keen-title="Your Usage of Feature X"
data-keen-filter="userId=<%= @user.id %>"
>

</div>

index.js

//= require keentivate.min.js
//= require initialize.js

initialize.js

var keenCharts = new keentivate({
    projectId: "50f9e…000000",
    readKey: "b26ea03…3ed44c"
  },
  {
    keenClass: "keentivate"
  }
);

track.rb

Analytics.track({
  :user_id => @user.id,
  :event => 'Used Feature X',
  :properties => {
    :anything_else => "About this event"
  }
})