Re: [Matplotlib-users] Apparent bug in Data limits with LineCollections

[Christopher B. <Chr...@no...>]

Eric Firing wrote:
> Attached is a slight modification of your test case, with annotations.

Thanks Eric, that does work. I'd rather the Z-order be set with the 
LineCollection under the plot, but it doesn't matter much, and I can 
probably manipulate that by hand if need be.

> think it does what you want--sort of.  But I agree that there is a bug.  
> After chasing references backwards and forwards through axes.py, 
> axis.py, ticker.py, and _transforms.cpp, I don't quite understand how 
> everything works,

You got father than me.

> Workarounds: either set the dataLim explicitly, or add the collection 
> after the plot command (as in the attached modified script).  The latter 
> only works if the plot command sets the dataLim to be large enough to 
> cover everything in the collection.

Yes, I may need to set dataLim myself after all.

> I would like to make a genuine bugfix, but I do not yet understand all 
> this well enough to do so right now.  Maybe John will chime in with a 
> good solution.

I think the relevant questions are these:

Is there a reason that add_collection doesn't reset the dataLim?

Is there a reason that axes.cla() doesn't reset the dataLim?

The fix will depend on those answers. I'd like to see both done.

John?

Thanks for your help, Eric.

-Chris


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Chr...@no...