速度与时间的关系图

Question

I am trying to display a speed/time graph using flot. I receive data from a servlet. I have a large number of GPS tracking events with time-stamp,speed,locations etc.
If a user choose to view graph for say 2 days , the graph looks like this :

this is because their is a long pause between gps events. ( horizontal is time in hours and vertical is speed in km/hr )

Now if a user choose to view graph for a small time say 10 hrs or something like that(where their is no long pause in gps events) the graph looks perfect like this :

The data which creates the graph is here

As you can see, the first graph is just unreadable, My question is how can I make the first graph more readable.

Answer 1

Use something like a mirrored logaritmic scale. Flot allows you to configure the steps of the chart.

Something like ( copied from here ):

xaxis: {
    transform: function (v) { return Math.log(v); },
    inverseTransform: function (v) { return Math.exp(v); }
}