ax.spines['top'].set_visible(False)

This line of code is used to hide the top axis spine in a matplotlib plot. The `ax` variable refers to the axes object on which the plot is being created. The `.spines` attribute of this object returns a dictionary-like object that can be used to set the properties of the four axes spines (top, bottom, left, and right). The `['top']` index is used to select the top spine, and the `.set_visible(False)` method is used to hide it.

相关问题

ax.spines['right'].set_visible(False) ax.spines['top'].set_visible(False) ax.spines['left'].set_visible(False) ax.spines['bottom'].set_visible(False)这是干嘛用的

这段代码是用于设置坐标轴的边框是否可见，通过设置 spines 属性的 visible 参数控制。其中，ax 表示当前的坐标轴对象，spines 表示坐标轴的四个边框（上、下、左、右），visible 参数为 False 表示不可见，为 True 表示可见。

在这段代码中，我们将边框全部设置为不可见，这样就可以得到一个无边框的图像。如果需要显示边框，可以将 visible 参数设置为 True。

ax=plt.axes ax.spines['top'].set_visible(False) ax.spines['right'].set_visible(False)

These lines of code create an axes object using the `plt.axes` method and then hide the top and right spines (axis lines) of the plot by setting their visibility to False using the `ax.spines` method. This results in a plot with only the left and bottom spines visible.