plot_chars in make_plot_function (riemann_utils.py)

[maojrs]

I am trying to set plot_chars = True while calling make_plot_function, but I keep getting an error. I think there might be a bug since this is called:
plot_characteristics(states,speeds,plot_chars,ax[0])

and the function actually takes:
plot_characteristics(reval, char_speed, axes=None, extra_lines=None).

[ketch]

@maojrs Please read the docstring of make_plot_function. It includes this:

plot_chars: If provided, ordinary characteristics are included in the x-t plot.
The value of this argument should be a function c(q,x) that gives
the characteristic speed.

[ketch]

You are right, though, about the bug. If you look at other notebooks you'll notice that I'm just calling plot_characteristics directly, so I forgot to change that call when I upgraded the function. Feel free to fix it, or I will do so soon.