Default select first bar of viz column graph when page loads

Hi All,

I have used viz chart library. I have given some drill down functionality on the column graph. For that I have to select any column of the graph to see the detail for the selected part (in the same page).

Now I want to select my first column/bar of the column graph automatically. It means when I go to the graph page, the first bar should be selected as default and the detail of the selected bar should be there.

Please help me guys.

Regards,

Niket Talati