Real Time Data Graph

I would like to build a web-based real time data graph and i'm looking at the different options such as: Html5 canvas JS libraries with graph support such as Extjs By real time i

Solution 1:

There is also SmoothieCharts that is designed more for this use-case.

Solution 2:

You may want to consider using Flot, an open-source plotting library based on jQuery.

I'm assuming that by real-time you mean that the graph will update automatically. The following is how your code would look like if you were to fetch and plot the data using AJAX polling at 1 second intervals:

functionfetchData() {
   $.ajax({
      url:      'json_fetch_new_data.php',
      method:   'GET',
      dataType: 'json',
      success:  function(series) {
         var data = [ series ];

         $.plot($('#placeholder'), data, options);
      }
   });

   setTimeout(fetchData, 1000);
}

Make sure to check out the following demo to see it in action (Click on the "Poll for Data" button):

• Flot Examples - Updating graphs with AJAX

For further information on Flot:

• Flot Project Site
• Flot Examples
• Other Flot Examples

Solution 3:

Other solution with design more nice and possibilities:

https://changelog.com/posts/rickshaw-realtime-javascript-graphing-library

example: http://shutterstock.github.com/rickshaw/examples/extensions.html

code: https://github.com/shutterstock/rickshaw