Flot With “String” x-axis

@Matt is close, but it would make more sense to just use the ticks option to directly specify what ticks should have what labels:

var options = {

...
  xaxis: {
    ticks: [[0,'Bob'],[1,'Chris'],[2,'Joe']]
  }
...

};

EDIT: it looks like this (I added more data than labels, but you get the idea).