Yes, Python is reference counted (with a garbage collector to handle 
cycles etc.).  So, yes, the matplotlib plot keeps a "reference" to your 
data after you pass it in so it continue to redraw it as the plot is 
panned/zoomed/resized etc.  You can safely del your local reference, but 
the memory itself will not be freed, since matplotlib still needs it.

Mike

guillaume ranquet wrote:
> I'm currently trying to improve my app to render more and more data.
> I'm wondering if matplotlib keeps an internal copy of the datas once the
> plot function has been called?
>
> from what I understand from python (I'm quite new to python), everything
>  is reference and no implicit copies are done. I'm trying to check on
> matplotlib if it's the case but I must admit I got some difficulties xD
>
>
> to sum it up: can I del the arrays I just passed to an axis.plot ?
>
>
> thanks for your help :)
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA


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