Charting Weight Change With Google Visualizations

I started trying to lose weight a while back, since we both know I'm a bit heavy and sitting in front of a computer isn't going to lose the weight for me.

Naturally, it's important that I incorporate technology into my weight loss somehow, right? So I decided to give the Google Visualizations API a spin.

I worked up a quick data format and a method to pop the data out. Nothing fancy, just a fixed width flat file. This doesn't deserve a database.

2010-06-30 235.4
2010-06-29 236.8

Easy to read, easy to edit, and easy to consume. Every morning I just hop on the server, add the day's weight and log off.

Now I just needed to represent it. The API is very object oriented and easy to work with. I wish there was a less verbose way of presenting the data, but you can't have everything.

Actually, there may be a better way, I just didn't come across it while speed reading the docs.

function drawChart() {
  var data = new google.visualization.DataTable();
  data.addColumn( 'string', 'Date' );
  data.addColumn( 'number', 'Weight' );

  data.addRows(  );

  var chart_div = document.getElementById( 'chart_div' );
  var chart = new google.visualization.LineChart( chart_div );
      width: 800,
      height: 600,
      title: 'Weight Over Time'

And there you have it, fancy charting in no time.

Example Chart

See it in action at

Get the full source at