从Matplotlib轴对象获取数据 [英] Getting data from matplotlib axes object

问题描述

我正在尝试确定 matplotlib 轴.在轴对象上是否缺少我要获取x/的属性?有数据值吗?

I'm trying to determine what the data points are on a matplotlib axes. Is there an attribute I'm missing on the Axes object to get the x/y data values?

例如，假设我的代码通过了一条线图，而我想打印出绘制的x/y值.

For example, say my code is passed a line plot, and I want to print out the x/y values that are plotted.

推荐答案

你的 plot 调用会给你一个 lines.Line2D，它有 get_xdata(orig=True) 和 get_ydata(orig=True) 方法.

Your plot call will give you a lines.Line2D, which has the get_xdata(orig=True) and the get_ydata(orig=True) methods.

您可以检查 LineesD 实例的 axes.get_children().

请注意，从软件设计的角度来看，您所做的事情听起来很可怕.您应该为打印原始数据的 plot 实现一个包装器.

Note that what you're doing sounds horrible from a software design point of view. You should rather implement something like a wrapper for plot that prints your raw data.

@JRichardSnape补充说，如果您的绘图只是线条，则可以使用 get_lines()，而不是过滤 get_children()的输出.

@JRichardSnape adds that iff your plot is only lines, you can use get_lines() rather than filtering the output of get_children().

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