How can I get the X axis labels in Flot to be transformed with my data?

I am using Flot to chart some data that I pull back from the server. The X-axis data that I receive is in units of milliseconds, and I want to display the chart with the X-axis in units of seconds. So, I thought this was a good use of the API's transform axis option. I applied my transform like so:

var plot = $.plot($("#placeholder"),
       { 
         grid: { hoverable: true, clickable: true },
         xaxis: { transform: 开发者_JAVA技巧function(x) { return x/1000; } }
       });

I can see that my transform function is being called by the framework, and I can see that the points themselves are being transformed -- when I bind the plothover event and hover over the points, I can see that the X value is suitably transformed. The problem is that the x-axis tick labels are not also getting transformed.

What do I need to do to get the axis labels themselves transformed with my data?

I'm not sure what the "right" answer is, but you can provide your own tick labelling function, and just have it perform the same job as your transform function.

var plot = $.plot($("#placeholder"),
   { 
     grid: { hoverable: true, clickable: true },
     xaxis: { transform: function(x) { return x/1000; },
              tickFormatter: function(x) { return x/1000; } }
   });