Re: [Matplotlib-users] passing multiple path arguments to make_compound_path

[Francesco M. <fra...@gm...>]

Hi,

put all them into a list

ps = [p1, p2, ..., pn]

and then unpack them

path.Path.make_compound_path(*ps)

Cheers,

Fra

ps: this is standard python unpacking


2014-11-27 18:12 GMT+01:00 Evan Mason <eva...@gm...>:

> Hi, I have several path objects that I want to join together with
> make_compound_path.
>
> For example, with p1 and p2:
>
> In [136]: p1
> Out[136]:
> Path(array([[-29.85721973, -30.        ],
>        [-29.84752676, -29.77715877],
>        [-29.88734508, -29.55431755],
>        [-29.97470553, -29.33147632],
>        [-30.        , -29.28831083]]), None)
>
> In [138]: p2
> Out[138]:
> Path(array([[-30.        ,  45.0000166 ],
>        [-29.94756898,  45.09749304],
>        [-29.87227011,  45.32033426],
>        [-29.84525888,  45.54317549],
>        [-29.86787108,  45.76601671],
>        [-29.93898847,  45.98885794],
>        [-30.        ,  46.10595725]]), None)
>
> I can do path.Path.make_compound_path(p1, p2) which joins them
> successfully.
> If I have a another path, p3, I can do:
>     path.Path.make_compound_path(p1, p2,p3), and so on.
>
> However, in my script I never know how many paths I will have, so I'd like
>  to put them into some sort of container, and pass that to
>  make_compound_path.  I've tried lists:
>
>
> In [140]: p1p2 = [p1, p2]
>
> In [141]: path.Path.make_compound_path(p1p2)
> ---------------------------------------------------------------------------
> AttributeError                            Traceback (most recent call last)
> <ipython-input-141-eb62de9fcada> in <module>()
> ----> 1 path.Path.make_compound_path(p1p2)
>
> /usr/lib64/python2.7/site-packages/matplotlib-1.4.2-py2.7-linux-x86_64.egg
> /matplotlib/path.py
> in make_compound_path(cls, *args)
>     330         total_length = sum(lengths)
>     331
> --> 332         vertices = np.vstack([x.vertices for x in args])
>     333         vertices.reshape((total_length, 2))
>     334
>
> AttributeError: 'list' object has no attribute 'vertices'
>
>
> without success.  Can anybody suggest a way to do this?
>
> Thanks, Evan
>
>
>
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