Re: [Matplotlib-users] Fixed patch relative to axes

[Eric F. <ef...@ha...>]

Thomas Robitaille wrote:
> Thanks!
> 
> Is there an easy way to keep a reference to patches? I notice that for 
> example
> 
> p = ax.add_patch(Circle((0.5,0.5),radius=0.5))
> 
> does not work (p is not a reference to the patch). Is there a way to 
> keep a reference so I can update the properties of the patch at a later 
> time?

Split the command up:
p = Circle(...)
ax.add_patch(p, ...)

(add_* could be modified to return the reference; maybe this would be 
worthwhile.)


Eric

> 
> Cheers,
> 
> Thomas
> 
> On 29 Apr 2009, at 21:13, Eric Firing wrote:
> 
>> Thomas Robitaille wrote:
>>> Hi,
>>> Is there an easy way to draw a patch or a patchcollection such that 
>>> it  always stays at the same relative position in a set of axes, 
>>> rather  than at the same pixel position? So for example, I would want 
>>> to plot  it at (0.1,0.1) relative to the axes, and if I zoom in I 
>>> would still  want it to stay at (0.1,0.1)
>>
>> With ipython -pylab:
>>
>> ax = gca()
>> ax.fill([0.1, 0.2, 0.15], [0.1, 0.1, 0.15], transform=ax.transAxes)
>> draw()
>>
>> then pan, zoom at will.
>>
>> Eric
>>
>