Re: [Matplotlib-users] OS X Bad Aspect Ratio

[David Warde-F. <dw...@cs...>]

On 4-Sep-08, at 10:03 PM, Josh Lawrence wrote:

> Hey all,
>
> When I plot using python 2.5.2 and matplotlib 0.98.3 (and 0.98.1) I
> have the following problem. If I run a script from the command line
> that plots and saves the figure, I get the default aspect ratio of (8,
> 6). If, however, I close the plotting window and replot without
> exiting the python prompt and starting anew, the aspect changes to
> something like (8, 6.04). I can reliably get the (8, 6) aspect ratio
> if I quit the python prompt and load a new prompt. The problem only
> comes after I close the plot window and replot.

I just attempted to reproduce your problem with 0.98.3 and couldn't; I  
managed to get identical screenshots after closing the window and  
replotting.

Several things you could tell us that might help isolate the problem:

- What GUI backend? TkAgg I'm assuming? If you're unsure, import  
matplotlib and use the matplotlib.get_backend() function.
- What plotting commands are you using?
- Does the aspect ratio change if you do something simple like, say,

import numpy
from pylab import *
x = numpy.randn(50,50)
imshow(x)
(close window)
imshow(x)

import numpy
from pylab import *
x = numpy.arange(1,10)
plot(x, x**2)
(close window)
plot(x,x**2)

Neither of these lead to an aspect ratio shift for me, on OS X 10.5  
with the TkAgg backend, same version of matplotlib.

David