I have a php script that generates the google chart data and returns it in json encoded format. It's loaded into google chart using jQuery $.get() method. When I pass the return data to the google arrayToDataTable function like this:

var googleChartData = google.visualization.arrayToDataTable(chartData);

I get this error:

So, what I did was I dumped the value of my variable chartData and I got the following:

So, what I did was, copy this data from console window into the arrayToDataTable function manually like this:

var googleChartData = google.visualization.arrayToDataTable([[Date Range,0001/102/0 Available,0001/102/0 Unavailable,0001/102/1 Available,0001/102/1 Unavailable],[02/10/2013,0,1,110,11],[03/10/2013,0,1,189,11],[04/10/2013,0,1,189,11],[06/10/2013,0,1,189,10],[07/10/2013,0,1,187,10],[08/10/2013,186,11,0,1],[09/10/2013,186,11,0,1],[10/10/2013,0,1,186,11],[11/10/2013,0,1,204,11],[13/10/2013,0,1,204,11]]);

Now the chart renders (as expected, because the returned data from my php script is correct):

This is a bit bizarre; does any one know why the chart doesn't work when it's loaded from the variable?