Perhaps something is odd with the date values you have? Can you make an
SSCCE (sscce.org)that demonstrates the problem? There is definitely some
sort of bug at play here.
Cheers!
Ben Root
On Tue, Sep 16, 2014 at 9:20 AM, Gerd Wellenreuther <
gerd.wellenreut...@xfel.eu> wrote:
> Tried this before, I think, here is the traceback (it is kind of
> different) - maybe it tells some of you where to look at IF this should
> really be a bug:
>
>
> Traceback (most recent call last):
> File "C:\Users\gwellenr\Desktop\Test_Sabine\Plot_csv.py", line 187, in
> <module>
> matplotlib.pyplot.savefig(save_path+'test.png')
> File "C:\Python27\lib\site-packages\matplotlib\pyplot.py", line 561, in
> savefig
> return fig.savefig(*args, **kwargs)
> File "C:\Python27\lib\site-packages\matplotlib\figure.py", line 1421, in
> savefig
> self.canvas.print_figure(*args, **kwargs)
> File "C:\Python27\lib\site-packages\matplotlib\backend_bases.py", line
> 2220, in print_figure
> **kwargs)
> File "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py",
> line 505, in print_png
> FigureCanvasAgg.draw(self)
> File "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py",
> line 451, in draw
> self.figure.draw(self.renderer)
> File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python27\lib\site-packages\matplotlib\figure.py", line 1034, in
> draw
> func(*args)
> File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python27\lib\site-packages\matplotlib\axes.py", line 2086, in
> draw
> a.draw(renderer)
> File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 1091, in
> draw
> ticks_to_draw = self._update_ticks(renderer)
> File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 945, in
> _update_ticks
> tick_tups = [t for t in self.iter_ticks()]
> File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 889, in
> iter_ticks
> majorLocs = self.major.locator()
> File "C:\Python27\lib\site-packages\matplotlib\dates.py", line 802, in
> __call__
> self.refresh()
> File "C:\Python27\lib\site-packages\matplotlib\dates.py", line 820, in
> refresh
> self._locator = self.get_locator(dmin, dmax)
> File "C:\Python27\lib\site-packages\matplotlib\dates.py", line 896, in
> get_locator
> raise ValueError('No sensible date limit could be found in the '
> ValueError: No sensible date limit could be found in the AutoDateLocator.
>
>
> Cheers, Gerd
>
>
> On 16.09.2014 13:45, Joe Kington wrote:
>
> 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 convert them to the
> datetime units that matplotlib uses internally.
>
> Hope that helps!
> -Joe
>
> On Tue, Sep 16, 2014 at 4:00 AM, Gerd Wellenreuther <
> gerd.wellenreut...@xfel.eu> wrote:
>
>> 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). Unfortunately,
>> the default enumeration of the y-axis is the other way around, and it
>> resists my attempts to invert its direction e.g. by changing limits
>> using matplotlib.pyplot.ylim (Traceback below). I found a quite old
>> entry in stackoverflow which is most probably outdated, at least the
>> proposed solution did not work for me...
>> (
>> http://stackoverflow.com/questions/5804969/displaying-an-inverted-vertical-date-axis
>> ).
>>
>> Since the longish traceback seems to try to tell me I did not understand
>> some kind of important - even trivial - point about those datetime-axis
>> maybe some of you came about this problem before?
>>
>> Thanks, Gerd
>>
>> P.S.: Traceback after trying to use something like
>> "matplotlib.pyplot.ylim(ymax,ymin)":
>> > Traceback (most recent call last):
>> > File "C:\Users\gwellenr\Desktop\Test_Sabine\Plot_csv.py", line 187,
>> > in <module>
>> > matplotlib.pyplot.savefig(save_path+'test.png')
>> > File "C:\Python27\lib\site-packages\matplotlib\pyplot.py", line 561,
>> > in savefig
>> > return fig.savefig(*args, **kwargs)
>> > File "C:\Python27\lib\site-packages\matplotlib\figure.py", line
>> > 1421, in savefig
>> > self.canvas.print_figure(*args, **kwargs)
>> > File "C:\Python27\lib\site-packages\matplotlib\backend_bases.py",
>> > line 2220, in print_figure
>> > **kwargs)
>> > File
>> > "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py",
>> > line 505, in print_png
>> > FigureCanvasAgg.draw(self)
>> > File
>> > "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py",
>> > line 451, in draw
>> > self.figure.draw(self.renderer)
>> > File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55,
>> > in draw_wrapper
>> > draw(artist, renderer, *args, **kwargs)
>> > File "C:\Python27\lib\site-packages\matplotlib\figure.py", line
>> > 1034, in draw
>> > func(*args)
>> > File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55,
>> > in draw_wrapper
>> > draw(artist, renderer, *args, **kwargs)
>> > File "C:\Python27\lib\site-packages\matplotlib\axes.py", line 2086,
>> > in draw
>> > a.draw(renderer)
>> > File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55,
>> > in draw_wrapper
>> > draw(artist, renderer, *args, **kwargs)
>> > File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 1091,
>> > in draw
>> > ticks_to_draw = self._update_ticks(renderer)
>> > File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 945,
>> > in _update_ticks
>> > tick_tups = [t for t in self.iter_ticks()]
>> > File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 889,
>> > in iter_ticks
>> > majorLocs = self.major.locator()
>> > File "C:\Python27\lib\site-packages\matplotlib\dates.py", line 802,
>> > in __call__
>> > self.refresh()
>> > File "C:\Python27\lib\site-packages\matplotlib\dates.py", line 820,
>> > in refresh
>> > self._locator = self.get_locator(dmin, dmax)
>> > File "C:\Python27\lib\site-packages\matplotlib\dates.py", line 896,
>> > in get_locator
>> > raise ValueError('No sensible date limit could be found in the '
>> > ValueError: No sensible date limit could be found in the
>> AutoDateLocator.
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Want excitement?
>> Manually upgrade your production database.
>> When you want reliability, choose Perforce.
>> Perforce version control. Predictably reliable.
>>
>> http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk
>> _______________________________________________
>> Matplotlib-users mailing list
>> Matplotlib-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>
>
>
>
> ------------------------------------------------------------------------------
> Want excitement?
> Manually upgrade your production database.
> When you want reliability, choose Perforce.
> Perforce version control. Predictably reliable.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>
------------------------------------------------------------------------------
Want excitement?
Manually upgrade your production database.
When you want reliability, choose Perforce.
Perforce version control. Predictably reliable.
http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
