Speaking of racetrack charts, did anybody make a graph of the positions of the horses over time during the recent Kentucky Derby?
I’m thinking it could be done on a very long 2-d strip (imagining the racecourse laid out as a long strip from beginning to end, with width corresponding to the width of the track), with a different color for each horse–maybe using solid lines for the top 6 finishers and light lines for the others. Also, maybe the positions of the horses every 5 seconds (say) could be connected with light gray lines–then you’d be able to see who was ahead at any given point in time.
Does this graph already exist somewhere? Or are there better ideas?