Re: [Matplotlib-users] line drawing bug or it's me doing something wrong?

[Michael D. <md...@st...>]

Andrew Straw wrote:
> Paweł Rumian wrote:
>   
>> 2010/1/14 Michael Droettboom <md...@st...>:
>>   
>>     
>>> What backend are you using?  Agg, Cairo and Wx all check out for me.  The
>>> examples you point to don't look like Agg output to me...
>>>     
>>>       
>> The examples were produced using savefig and PNG, but I've tried GTK
>> and Qt with Agg and Cairo - neither of them works.
>>
>>   
>>     
>>> Do you have anything in your matplotlibrc?
>>>     
>>>       
>> Nothing but the backend...
>>
>> I've just noticed that the green line shows sometimes when moving the plot.
>> Quick examples:
>> no move: http://img524.imageshack.us/img524/5696/61571712.png
>> slightly right (no change): http://img94.imageshack.us/img94/6722/44916983.png
>> more (green line appears): http://img27.imageshack.us/img27/522/91772530.png
>> even more (disappears behind the edge):
>> http://img246.imageshack.us/img246/9726/24229795.png
>> to the right (another part suddenly appears):
>> http://img190.imageshack.us/img190/5697/69412483.png
>>
>> still no idea...
>>   
>>     
> Hi Paweł, to repeat a point that may have been lost in Michael's first
> email, some code that produces the problem will be greatly useful in
> tracking down what's going on.
>   
If I gather correctly, the masked_demo.py example in the matplotlib 
source is sufficient to reproduce the bug.  Unfortunately, I can't 
reproduce it here with 0.99.1.1 or SVN HEAD, so there's some 
environmental difference about Pawel's system -- of course I'm at a loss 
as to what it might be.

Are you sure you're running 0.99.1.1?  Earlier versions have exhibited 
this class of bug, but I thought they were all squashed by now.  What 
does the following give for you?

 > python
Python 2.5.2 (r252:60911, May  7 2008, 12:40:32)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import matplotlib
 >>> matplotlib.__version__
'0.99.1.1'

Cheers,
Mike

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA