Misc. problems

[rjleveque]

Noticed while going through #74...

• Introduction.ipynb: double rarefaction at earliest t shows artifacts at discontinuity,
• Introduction.ipynb: The interacts have t = 0.001 to avoid problems at t=0 and these are not reset to t=0.2 by utils.snapshot_widget.
• Intro and elsewhere: utils.snapshot_widget creates some plots where it's not clear what time the solution is shown at, do we want to include t in titles?
• Traffic_flow.ipynb: Traffic jam shock leaves the domain: expand xlim?
• Shallow_water.ipynb: Why do cells show tags (only in this notebook)?
• Shallow_tracer.ipynb: Redo with the new plotting of stripes rather than using PyClaw? Needs more description too.

[ketch]

Shallow_water.ipynb: Why do cells show tags (only in this notebook)?

You can turn the visibility of tags on and off through the menu: View -> Cell Toolbar -> Tags

I probably saved it with this on by accident -- sorry!

[ketch]

Shallow_tracer.ipynb: Redo with the new plotting of stripes rather than using PyClaw? Needs more description too.

That chapter is just a placeholder; it's not in the PDF yet.