[Matplotlib-users] Arc drawing

[Paul Hobson]

Hey Luca,

You're referencing some variables in your snippet that you haven't defined,
so I can't really help you troubleshoot that.

Here's a basic example to get you started:

from matplotlib import pyplot
from matplotlib import patches

fig, ax = pyplot.subplots()

arc = patches.Arc(
    xy=(2, 3),
    width=5,
    height=5,
    angle=0,
    theta1=45,
    theta2=180,
)

ax.add_patch(arc)
ax.set_aspect('equal')
ax.autoscale()

On Mon, Nov 2, 2020 at 8:36 AM Luca Bertolotti <luca72.bertolotti at gmail.com>
wrote:

> Hy Paul
> I heve read it but i'm not able to draw it:
> The data that i have are:
> {'handle': '39D', 'owner': '1F', 'layer': 'AM_0', 'center': Vector(1000.0,
> -1256.595067376733, 0.0), 'radius': 2100.0, 'start_angle':
> 67.75727639121727, 'end_angle': 112.2427236087827}
>
>  h= float(2* entity.dxf.radius)
>
> I have try this:
> b = Arc((float(xr), float(yr)), (h, h),0, float(entity.dxf.end_angle),
> float(entity.dxf.end_angle) , color='red', lw=1)
>                 ax.add_patch(b)
>
> But i get:
> Exception "unhandled TypeError"
> can't multiply sequence by non-int of type 'float'
> File:
> c:\users\luca\appdata\local\programs\python\python38\lib\site-packages\matplotlib\patches.py,
> Line: 1427
>
> Can you help me
>
> Bets Regards
>
> Il giorno lun 2 nov 2020 alle ore 17:07 Paul Hobson <pmhobson at gmail.com>
> ha scritto:
>
>> Hey Luca,
>>
>> Matplotllib has an Arc artist:
>> https://matplotlib.org/3.3.2/api/_as_gen/matplotlib.patches.Arc.html
>>
>> -Paul
>>
>> On Mon, Nov 2, 2020 at 5:02 AM Luca Bertolotti <
>> luca72.bertolotti at gmail.com> wrote:
>>
>>> Hello i have to draw an arc with matplotlib, i have the following data:
>>>
>>> {'handle': '39D', 'owner': '1F', 'layer': 'AM_0', 'center':
>>> Vector(1000.0, -1256.595067376733, 0.0), 'radius': 2100.0, 'start_angle':
>>> 67.75727639121727, 'end_angle': 112.2427236087827}
>>> basically i have :
>>> Center of the arc
>>> Starting angle
>>> end angle.
>>> Do you have any suggestion
>>>
>>> Regards
>>> _______________________________________________
>>> Matplotlib-users mailing list
>>> Matplotlib-users at python.org
>>> https://mail.python.org/mailman/listinfo/matplotlib-users
>>>
>>
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