Seaborn boxplot 中的框坐标 [英] Coordinates of boxes in Seaborn boxplot

问题描述

这个例子，扩展了此处，显示了如何标记条形图在Matplotlib中；类似的想法可以用来标记箱形图.它依赖于知道由 barplot 函数返回的条形的 x 和 y 坐标.我怎样才能对 Seaborn 箱线图做同样的事情?不幸的是，Seaborn 不会返回这些坐标.

This example, extended here, shows how to label bar plots in Matplotlib; a similar idea can be used to label box plots. It relies on knowing the x and y coordinates of the bars, which are returned by the barplot function. How can I do the same thing for Seaborn box plots? Unfortunately Seaborn does not return these coordinates.

推荐答案

你可以稍微修改一下来找到它们，但它并不漂亮.

You can hack around a bit to find them, but its not pretty.

sns.boxplot 返回 matplotlib 绘制框的轴实例.

sns.boxplot returns the matplotlib Axes instance the boxes are drawn on.

框被创建为 matplotlib.patches.PathPatch 实例.

我们可以找到这样的实例:

We can find those instances like so:

import matplotlib
import matplotlib.pyplot as plt
import seaborn as sns

tips = sns.load_dataset("tips")

ax = sns.boxplot(x="day", y="total_bill", data=tips)

for c in ax.get_children():
    if type(c) == matplotlib.patches.PathPatch:
        print(c.get_extents())

这将打印框的 BBox ，在此示例中:

This will print the BBox of the boxes, in this example:

Bbox(x0=92.4, y0=116.996, x1=191.6, y1=162.242666667)
Bbox(x0=216.4, y0=114.957333333, x1=315.6, y1=171.6)
Bbox(x0=340.4, y0=125.576, x1=439.6, y1=189.141333333)
Bbox(x0=464.4, y0=131.926666667, x1=563.6, y1=194.172)

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