上述两种方法与matplotlib.patches.ConnectionPatch有什么区别？

`matplotlib.patches.ConnectionPatch`是`matplotlib`中专门用于绘制连接线的类，它可以绘制不同样式的连接线，包括直线、曲线、箭头等。相对于`plt.plot()`和`ax.plot()`这两种方法，`ConnectionPatch`具有更为灵活的配置方式，可以通过设置不同的参数来实现不同的连接线样式。

具体而言，`plt.plot()`和`ax.plot()`主要用于绘制直线，可以通过设置`linestyle`参数来控制线条的样式，例如实线、虚线等，但是不能直接设置连接线的起点和终点。而`ConnectionPatch`则专门用于绘制连接线，可以通过设置`ConnectionPatch`对象的`xyA`和`xyB`属性来指定连接线的起点和终点。此外，`ConnectionPatch`还可以设置其他属性，例如线条宽度、颜色、箭头样式等，具有更为灵活的配置方式。

总的来说，`plt.plot()`和`ax.plot()`主要用于绘制简单的直线，而`ConnectionPatch`则适用于绘制更为复杂的连接线，具有更高的灵活性和可定制性。

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matplotlib.patches

`matplotlib.patches` is a module in the `matplotlib` library that provides classes for creating different types of geometrical shapes such as rectangles, circles, polygons, ellipses, etc. These shapes are used to highlight specific regions or areas in a plot or chart.

Some of the commonly used classes in the `matplotlib.patches` module are:

- `Rectangle`: A rectangular shape with given width and height.
- `Circle`: A circular shape with given radius.
- `Polygon`: A shape with given vertices.
- `Ellipse`: An oval shape with given width and height.

These classes have various methods and properties that allow customization of the shape's appearance. For example, the `Rectangle` class has methods to set the edge color, fill color, and linewidth of the rectangle. Similarly, the `Ellipse` class has methods to set the edge color, fill color, and angle of rotation.

Overall, `matplotlib.patches` provides a convenient way to add visual elements to a plot or chart, making it more informative and visually appealing.

matplotlib.patches.circle

matplotlib.patches.circle是Matplotlib库中的一个类，用于创建圆形形状的图形对象。可以通过指定圆心坐标、半径、颜色、边框宽度等属性来创建一个圆形对象，并将其添加到Matplotlib图形中。该类还提供了一些方法，如set_radius()、set_center()等，用于修改圆形对象的属性。