如何在 hexbin 图的顶部绘制轮廓? [英] How do I plot contours on top of a hexbin plot?

问题描述

我有两个数组，x 和 y，它们的值都在一个明确定义的范围内.我可以创建一个六边形图(参见图片)，但是，我现在想对这些分布进行归一化并在它们周围绘制等高线图.我对每个hexbin中的计数都不感兴趣.相反，我感兴趣的是显示对应于 1、2 和 3 个标准差 (σ) 的轮廓.我希望有一个输出显示类似于 this 示例的轮廓.分布为高斯分布.如果您对此有任何意见，我将不胜感激.

I have two arrays, x and y, both with values within a well defined range. I am able to create a hexbin plot (see image), however, I would now like to normalize these distributions and draw contour plots around them. I am not so interested in the counts within each hexbin. Instead I am interested in showing the contours corresponding to 1, 2 and 3 standard deviations (σ). I hope to have an output showing the contours similar to this example. The distribution is Gaussian. I would greatly appreciate any input on this.

推荐答案

根据 hexbin 文档

According to the hexbin documentation https://matplotlib.org/3.1.1/api/_as_gen/matplotlib.pyplot.hexbin.html you should be able to access the (x,y) locations of the bins and the values from the returned variable. For example:

h = hexbin(...)
xy = h.get_offsets()
v = h.get_array()

您可以使用这些来绘制轮廓.

You can use these to draw your contour.

请注意，文档不正确，并说应该调用 get_offset()，但该函数不存在，它是 get_offsets().

Note that the documentation is incorrect and says get_offset() should be called, but that function does not exist, it is get_offsets().

此外，当使用 xscale='log' 和 yscale='log' 调用 hexbin 时，则 get_offsets()仅返回 array([[0.，0.]]).

In addition, when hexbin is called with xscale='log' and yscale='log', then get_offsets() only returns array([[0., 0.]]).

这篇关于如何在 hexbin 图的顶部绘制轮廓?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！