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added examples in boris_push docstring - #1556
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| >>> plt.plot(x,y) | ||
| >>> plt.xlabel('x [m]') | ||
| >>> plt.ylabel('y [m]') | ||
| >>> plt.title(r"Single particle motion without $\vec{E}$ field") | ||
| >>> plt.grid() | ||
| >>> plt.gca().set_aspect('equal') |
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Rather than plotting, which is not going to display in rendered docs at https://docs.plasmapy.org/en/stable/api/plasmapy.simulation.particle_integrators.boris_push.html#plasmapy.simulation.particle_integrators.boris_push and is best kept in jupyter notebooks such as https://docs.plasmapy.org/en/stable/notebooks/ExB_drift.html, perhaps we can instead display a few examples? This chains into something I also just realized...
| >>> y = [] | ||
| >>> | ||
| >>> for _ in range(150): | ||
| >>> boris_push(x = x_0, v = v_0, B=B, E=0, q=1.0, m=1.0, dt=0.01) |
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So I just realized that the boris_push implementation we've got here only modifies the input x, v arrays. This is good for performance but is dreadful for quickly displaying how it works. I think adding an inplace = False keyword argument would be okay both for docs and for future developments here (for example I have a couple ideas on doing this through jax or some such optimizer...), if you'd be up for it!
And then, rather than having an embedded minimal simulation here, I think it'd be better to show how how to use the boris pusher:
- how it returns the x, v arrays in the next time step (the essence of what it does)
- how it modifies the x, v arrays by default (show them before/after)
- how, for B parallel to V, it does nothing;
- what it does for B perpendicular to V;
- how for nonzero E and zero B it reduces to the leapfrog algorithm.
Also, to easily do this from the IPython shell, try the %doctest_mode magic command:
[ins] In [1]: %doctest_mode
Exception reporting mode: Plain
Doctest mode is: ON
>>> 2 + 2
4
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Ok I will work on that and prepare new version in accordance with your suggestions.
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So, uh, I guess this one issue was a bit under-specified 😅 |
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StanczakDominik
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Hey, finally circled back to looking into this! I'm sorry for the long delay, a lot has been happening, as you likely well know :) Looks great, I do have one minor suggestion though - changing the default back to the previous one.
If you agree with the proposed changes, we can merge this pretty quickly. It would still need a changelog entry, but besides that, it looks pretty much done.
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I also think merging the suggestions (or doing anything to the branch, really) and re-triggering CI might get rid of some of the noise from the Documentation test 😅 |
Co-authored-by: Dominik Stańczak <stanczakdominik@gmail.com>
Co-authored-by: Dominik Stańczak <stanczakdominik@gmail.com>
Co-authored-by: Dominik Stańczak <stanczakdominik@gmail.com>
Unfortunately, I continue to get errors related to the documentation :( |
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Let's see if that fixes things. The doc build seems to have been an unrelated issue fixed elsewhere (that's distributed project development for ya, sorry I missed it! 😅). I also adjusted the doctest values for a few changes where they started differing from what we actually got. |
StanczakDominik
added
simulations
no changelog entry needed
Codecov Report
@@ Coverage Diff @@
## main #1556 +/- ##
=======================================
Coverage 97.22% 97.22%
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Files 84 84
Lines 8000 8003 +3
=======================================
+ Hits 7778 7781 +3
Misses 222 222
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This reverts commit 3ee721a.
StanczakDominik
added
simulations
and removed
no changelog entry needed
StanczakDominik
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NOW this should do it :)
The detail on the ``inplace`` keyword seemed different from the docstring description, so I dropped the description from the changelog entry.
namurphy
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plasmapy.simulation
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docstrings.
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