Re: [Matplotlib-users] creating an object oriented matplotlib figure

Ok, I understand about agg, but I am still a bit confused.  First when I 
run the suggested code using whatever the default backend is the figure 
is only displayed for a second and then it goes away and the program 
ends.  I guess what I am really interested in is what plt.figure() 
does.  It seems to be creating a figure manager which has a canvas and a 
figure in it, but which one of these is responsible for the 
showing/saving to file?

Thanks for your help


On 1/16/13 5:02 AM, Francesco Montesano wrote:
> Hi Kelson,
>
> 2013/1/16 Kelson Zawack <kb...@co... <mailto:kb...@co...>>
>
>     I want to create a matplotlib figure as part of a program I am writing
>     and therefore would like to create the figure in a fully object
>     oriented
>     way, ie not in the pyplot state-full way.  I understand how to
>     work with
>     a figure object to create axes objects and then fill the axes objects
>     with primitive artists but I can't figure out what type of object
>     to put
>     the figure object in to get it displayed. 
>
> using qt4agg for me this works (version 1.2.0)
> fig = plt.figure()
> ax = fig.add_subplot(111)
> ax.plot([1,2])
> fig.show()
>
>     From digging around in the
>     source it looks like the show() method comes from the backend, but
>     when
>     I looked in 'matplotlib/backends/backend_agg' I saw no such object.
>     What am I missing?  I guess I could put the figure in a Qt window,
>     but I
>     like the functionality provided by the default matplotlib window.
>
>     Thanks for the help
>
>
> "agg" is not an interactive backend and is useful only when saving 
> figures 
> (http://matplotlib.1069221.n5.nabble.com/Backend-Agg-show-plot-td13162.html). 
> Thats why there is no show().
> e.g. qt4agg gets show from qt4
>
> does this help?
>
> Francesco
>
>
>
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