python - matplotlib pnpoly 例子结果报错

Question

我按照此处的示例运行了以下代码:

http://matplotlib.org/faq/howto_faq.html#test-whether-a-point-is-inside-a-polygon

非常感谢您的帮助。谢谢。

>>>import numpy as np
>>>import matplotlib.nxutils as nx
>>>verts = np.array([ [0,0], [0, 1], [1, 1], [1,0]], float)
>>>nx.pnpoly(0.5, 0.5, verts)

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "C:\Python27\lib\site-packages\matplotlib\nxutils.py", line 26, in pnpoly
    return p.contains_point(x, y)
  File "C:\Python27\lib\site-packages\matplotlib\path.py", line 289, in contains_point
    transform = transform.frozen()
AttributeError: 'float' object has no attribute 'frozen'

>>>nx.pnpoly(0.5, 1.5, verts)

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "C:\Python27\lib\site-packages\matplotlib\nxutils.py", line 26, in pnpoly
    return p.contains_point(x, y)
  File "C:\Python27\lib\site-packages\matplotlib\path.py", line 289, in contains_point
    transform = transform.frozen()
AttributeError: 'float' object has no attribute 'frozen'

Answer 1

matplotlib 论坛上的一位用户提供了以下内容，经我测试可以正常工作:

from matplotlib.path import Path
path = Path(polygonVerts)
isInside = path.contains_point(point)