Refresh/Reload Flot In Javascript

Hey Guys, does anyone know how to reload a flot graph in javascript? For instance, I want to redraw the graph every time an input value is changed. I tried experimenting with a few methods found in the flot API, such as draw() and setupGrid() without any luck.

Here's some example code:

$("#some_input_box").change(function(){
   plot.draw(); // redraw graph
});