Re: [Matplotlib-users] python v ipython problem in imshow()

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Thanks for your reply.
Just to make sure I understand correctly: Do you still think that there is a bug in the Mac OS X backend? Or does the bug only appear with wx?

Best,
--Michiel.

--- On Thu, 11/11/10, Garry Willgoose <Gar...@ne...> wrote:

> From: Garry Willgoose <Gar...@ne...>
> Subject: Re: [Matplotlib-users] python v ipython problem in imshow()
> To: "Michiel de Hoon" <mjl...@ya...>
> Cc: "Garry Willgoose" <Gar...@ne...>, "John Hunter" <jd...@gm...>, mat...@li...
> Date: Thursday, November 11, 2010, 10:00 PM
>  Michiel,
> 
> With some digging around in my own code  I have been
> able to reproduce the bug with the matplotlib example. My
> code uses wxPython and somewhere it sets the backend to 'WX'
> (this seems to require a bit more than simply 'import wx'
> but I haven't pursued what it might be ... there are several
> thousand lines of code before I get to the plotting). 
> the code below triggers the problem
> 
> import wx
> import matplotlib
> print 'matplotlib backend',matplotlib.rcParams['backend']
> matplotlib.use('WX')
> print 'matplotlib backend',matplotlib.rcParams['backend']
> 
> from pylab import *
> x = arange(100.0); x.shape = 10,10
> interp = 'bilinear';
> lim = -2,11,-2,6
> subplot(211, axisbg='g')
> title('blue should be up')
> imshow(x, origin='upper', interpolation=interp)
> subplot(212, axisbg='y')
> title('blue should be down')
> imshow(x, origin='lower', interpolation=interp)
> show()
> 
> 
> if I set the backend to WxAgg then the problem doesn't
> occur and if I don't set it all (so its MacOSX) then all is
> fine. In the example above the top graph is fine but the
> lower one is solid yellow. This behaviour is different from
> my code which shows the same image for both origin='upper'
> and 'lower'. My platform is enthought 6.1-1 with matplotlib
> 0.99.1.1.
> 
> Given that WXAgg works are there any are the implications
> of WXAgg early in my plotting part of the code (this may
> result in multiple calls to set the backend) versus letting
> matplotlib itself set WX. I just tried to set WXAgg
> immediately after the first 'import wx' after program
> startup but it had set to WX by the time it got the place
> where the plots were made.
> 
> > I haven't been able to replicate this bug. With all
> matplotlib versions
> > I tried (including 0.99.0, 0.99.1., 0.99.1.1,
> 0.99.1.2, 1.0.0, and the current source code in svn), this
> example works correctly with the Mac OS X backend.
> > Garry, what is the exact code that you are using?
> > 
> > --Michiel.
> > 
> > 
> > --- On Wed, 11/10/10, John Hunter <jd...@gm...>
> wrote:
> > 
> >> From: John Hunter <jd...@gm...>
> >> Subject: Re: [Matplotlib-users] python v ipython
> problem in imshow()
> >> To: "Michiel de Hoon" <mjl...@ya...>
> >> Cc: "Garry Willgoose" <Gar...@ne...>,
> mat...@li...
> >> Date: Wednesday, November 10, 2010, 10:59 AM
> >> On Wed, Nov 10, 2010 at 9:48 AM,
> >> Michiel de Hoon <mjl...@ya...>
> >> wrote:
> >>> Garry, if the bug still exists in matplotlib
> 1.0 could
> >> you open a bug report for it?
> >> 
> >> 
> >> I think Gary doesn't have easy access to
> 1.0.  Here is
> >> the relevant
> >> example if anyone has 1.0 on macosx to test with
> >> 
> >>   http://matplotlib.sourceforge.net/examples/pylab_examples/image_origin.html
> >> 
> >> JDH
> >> 
> > 
> > 
> > 
> > 
> >
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