plot forces ordering on Datetimeindex

introduced by #3619, opening this to track the issue for 0.11.1.

While the user should be able to get sorted ticks when plotting, it should not
be forced on him. so either opt-in or opt-out but not "one size fits all".

[jreback]

@y-p whats the deal on this?

huh?

[jreback]

just wanted to see if should bump to 0.12

[jreback]

why don't we just add a keyword, maybe sort_index=True which is the current behavior
False is prior, and if want to get really fancy allow a sorter function (via the same kw)?

[jreback]

I don't have an easy way of testing these kind of things (and that is why I don't really get involved in plotting)....I am just a user here :)

for some reason I can't import the dev version (the one I am working on) into my ipython notebook.....how do you do it?

I think you want python setup.py develop.

[jreback]

yep...thankks

[wesm]

Shelving for the release candidate, maybe push to 0.12.

This is about a change introduced for 0.11.1, so moving back the decision
to 0.12 seems like a bad move.

Seems it's either:

1. revert BUG: Reindex data if plotting time/period index (GH3601) #3619 (and replace by an option somewhere)
2. close this.

I seem to be in the minority in thinking this was the wrong solution, so 2 is fine by me.

[cpcloud]

@y-p @wesm any decision(s) on this?

@dieterv77, I'd like to revert #3619 and convert into a new issue to make this
an option in 0.12. I'm +1 on making this behavior the default, but the user should
be allowed to opt out.

Does that sound reasonable?

[wesm]

are there cases where the old behavior is what you want?

not really. I can imagine that in some RTL locales, ascending vs descending order of sorting
would be desired. Up till now that was in the hands of the user.

enough. I'm not championing this anymore.