New animation example (Joy Division's Unchained Love cover)

[rougier]

This is a (cool IMHO) plot animation inspired from the Joy Division Unchained Love cover.
It shows how to animate plots and how to simulate a cheap perspective effect.

I did it after answering this question on stack overflow.
http://stackoverflow.com/questions/23507217/python-plotting-2d-data-on-to-3d-axes/23968448#23968448

Nicolas

[tacaswell]

@efiring Does this count as a new feature?

[efiring]

@tacaswell, if you are asking about the "feature freeze" aspect, it's borderline, but I would say a new example is harmless and can be included. For an animation, it would be best if it could be tested on a variety of gui backends and platforms prior to release.

[NelleV]

Neat! I like it.

[NelleV]

Part of the code isn't pep8. Can you run pep8 on it, and fix the errors?
(Here, there should be a space after the coma)

[tacaswell]

Can you also squash this down to one commit?

[rougier]

Sure (but I do not know the git magic command, will search).

[tacaswell]

git fetch upstream and then git rebase -i upstream/master (assuming the remote that points at the canonical repo is called 'upstream') and follow the on-screen directions.

[tacaswell]

and then a git push --force github assuming 'github' in the remote that points to your matplotlib repo on github.

[rougier]

Ok, it's a total mess, maybe the easiest at this point it to create a new PR, no ?
(I started some git recipes before reading your post, sorry)

[tacaswell]

nah, it's savable (PRs on github point at branches so with force push you can save it).

git checkout unchained # make sure you are on the right branch
git reset --hard d8d28a7 # forcibly make the branch point at an earlier commit
git rebase -i upstream/master # do the rebase + squash

follow directions: put 's' before all of the commits but the first one, this should go smoothly

git push github # this will not work, but you should read the error message
git push --force github unchained # clobber what github thinks this branch points at

[rougier]

Just did that before reading your message. Thanks.
Should be ok now (hopefully).

Sorry for the trouble.

[tacaswell]

sorry, one last thing, update should return the artists changed. This is mostly to make blitting work.

[rougier]

Which one (there are 256 of them) ?

[tacaswell]

The list of all of them (lines).

[rougier]

done.

[AstroMike]

This demo is fantastic! ... the only problem is the name. I am not sure where "Unchained Love" comes from: the famous Joy Division album with the line art showing data from pulsar B1919+21 is called "Unknown Pleasures"

[rougier]

Thanks for the information. I don't remember where I get this name from actually.
Your reference to pulsar B1919+21 means the cover was showing actual data?

[AstroMike]

Yes, it's real data.

There have been several articles about the origins of this plot. For example:

https://blogs.scientificamerican.com/sa-visual/pop-culture-pulsar-origin-story-of-joy-division-s-unknown-pleasures-album-cover-video/

[rougier]

Fantastic ! Didn't know.