备注

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多边形选择器#

展示如何以编程方式或交互方式创建多边形

import matplotlib.pyplot as plt

from matplotlib.widgets import PolygonSelector

以编程方式创建多边形

fig, ax = plt.subplots()
fig.show()

selector = PolygonSelector(ax, lambda *args: None)

# Add three vertices
selector.verts = [(0.1, 0.4), (0.5, 0.9), (0.3, 0.2)]
polygon selector simple

以交互方式创建多边形

fig2, ax2 = plt.subplots()
fig2.show()

selector2 = PolygonSelector(ax2, lambda *args: None)

print("Click on the figure to create a polygon.")
print("Press the 'esc' key to start a new polygon.")
print("Try holding the 'shift' key to move all of the vertices.")
print("Try holding the 'ctrl' key to move a single vertex.")
polygon selector simple
Click on the figure to create a polygon.
Press the 'esc' key to start a new polygon.
Try holding the 'shift' key to move all of the vertices.
Try holding the 'ctrl' key to move a single vertex.

Tags: component: axes styling: position plot-type: line level: intermediate domain: cartography domain: geometry domain: statistics

参考

以下函数,方法,类和模块的用法在本例中显示:

  • matplotlib.widgets.PolygonSelector

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