Non-continuous data

Null series values will break the line when rendering, missing values will be skipped

/* data stolen from https://howmanyleft.co.uk/vehicle/jaguar_'e'_type */

var day_data = [

  {"period": "2012-10-01", "licensed": 3407},

  {"period": "2012-09-30", "sorned": 0},

  {"period": "2012-09-29", "sorned": 618},

  {"period": "2012-09-20", "licensed": 3246, "sorned": 661},

  {"period": "2012-09-19", "licensed": 3257, "sorned": null},

  {"period": "2012-09-18", "licensed": 3248, "other": 1000},

  {"period": "2012-09-17", "sorned": 0},

  {"period": "2012-09-16", "sorned": 0},

  {"period": "2012-09-15", "licensed": 3201, "sorned": 656},

  {"period": "2012-09-10", "licensed": 3215}

];

Morris.Line({

  element: 'graph',

  data: day_data,

  xkey: 'period',

  ykeys: ['licensed', 'sorned', 'other'],

  labels: ['Licensed', 'SORN', 'Other'],

  /* custom label formatting with `xLabelFormat` */

  xLabelFormat: function(d) { return (d.getMonth()+1)+'/'+d.getDate()+'/'+d.getFullYear(); },

  /* setting `xLabels` is recommended when using xLabelFormat */

  xLabels: 'day'

});