[Matplotlib-users] Inverting a datetime / plot_date y-axis

2014-09-16 Thread Gerd Wellenreuther
Dear all, I hope some of you could help me out. I am currently trying to generate some timetables using matplotlib.pyplot.plot_date, having the time-axis on the y-axis. Typically, one would like to read these plots from top to bottom, from older to newer items (future on the bottom).

Re: [Matplotlib-users] Inverting a datetime / plot_date y-axis

2014-09-16 Thread Joe Kington
A quick way to do this is ``ax.invert_yaxis()`` (and invert_xaxis() for the x-axis). That way you preserve auto-scaling and don't wind up with manually set axis limits. What you did should have worked, but ``ymin`` and ``ymax`` are probably datetime objects. ``ylim`` isn't smart enough to

Re: [Matplotlib-users] Inverting a datetime / plot_date y-axis

2014-09-16 Thread Benjamin Root
I would still consider this to be a bug, though. Gerd, could you please file a bug report? Cheers! Ben Root On Tue, Sep 16, 2014 at 7:45 AM, Joe Kington joferking...@gmail.com wrote: A quick way to do this is ``ax.invert_yaxis()`` (and invert_xaxis() for the x-axis). That way you preserve

[Matplotlib-users] get_xlim of dates

2014-09-16 Thread Xiaobo Yang
Hi, My X axis represents dates. When I used get_xlim(), I got something like 735461.0 and 735490.5. What are these values? How can I convert to python date objects? Many thanks, Tom -- Want excitement? Manually upgrade

Re: [Matplotlib-users] get_xlim of dates

2014-09-16 Thread Jerzy Karczmarczuk
Le 16/09/2014 17:31, Xiaobo Yang a écrit : My X axis represents dates. When I used get_xlim(), I got something like 735461.0 and 735490.5. What are these values? How can I convert to python date objects? Please, read the documentation of datetime. Your data are *ordinals*, numbers which

Re: [Matplotlib-users] get_xlim of dates

2014-09-16 Thread Scott Lasley
On Sep 16, 2014, at 11:31 AM, Xiaobo Yang xiaobo.y...@gmail.com wrote: Hi, My X axis represents dates. When I used get_xlim(), I got something like 735461.0 and 735490.5. What are these values? How can I convert to python date objects? Many thanks, Tom See the matplotlib dates

[Matplotlib-users] Anaconda Mac or matplolib bug ?

2014-09-16 Thread Christophe Bal
Hello. I do not know the guilty people in this story. The following code works with Anaconda Python 3 on Lubuntu 14 but it does not with Anaconda Python 3 Mac OS Maverick. Why ? This message has been posted on both the list of Anaconda and the one of matplotlib. Christophe === Code === #

Re: [Matplotlib-users] get_xlim of dates

2014-09-16 Thread Xiaobo Yang
many thanks - was struggling to find out where's the document! On 16 September 2014 17:20, Scott Lasley slas...@space.umd.edu wrote: On Sep 16, 2014, at 11:31 AM, Xiaobo Yang xiaobo.y...@gmail.com wrote: Hi, My X axis represents dates. When I used get_xlim(), I got something like