[Matplotlib-users] 2 x-axes

[Neal B. <ndb...@gm...>]

I have a semilog plot.  I'd like to add a second x axis (maybe below the 
existing one, or else maybe on top of graph).  This second x axis is simply 
describing the same existing data, in different units.

For example imagine a plot of

x - time in seconds
y - velocity

x2 - time in minutes