Python Matplotlib 箱线图颜色

Python Matplotlib Boxplot Color

提问by user58925

I am trying to make two sets of box plots using Matplotlib. I want each set of box plot filled (and points and whiskers) in a different color. So basically there will be two colors on the plot

我正在尝试使用 Matplotlib 制作两组箱线图。我希望用不同的颜色填充每组箱线图（以及点和胡须）。所以基本上剧情上会有两种颜色

My code is below, would be great if you can help make these plots in color. d0and d1are each list of lists of data. I want the set of box plots made with data in d0in one color, and the set of box plots with data in d1in another color.

我的代码如下，如果您能帮助制作这些彩色图，那就太好了。d0和d1是每个数据列表的列表。我想要一组用d0一种颜色的数据制作的箱线图，以及一组用d1另一种颜色的数据制作的箱线图。

plt.boxplot(d0, widths = 0.1)
plt.boxplot(d1, widths = 0.1)

回答by ImportanceOfBeingErnest

To colorize the boxplot, you need to first use the patch_artist=Truekeyword to tell it that the boxes are patches and not just paths. Then you have two main options here:

要为箱线图着色，您需要首先使用patch_artist=True关键字来告诉它这些箱体是补丁而不仅仅是路径。那么你在这里有两个主要选择：

1. set the color via ...propskeyword argument, e.g.
   boxprops=dict(facecolor="red"). For all keyword arguments, refer to the documentation
2. Use the plt.setp(item, properties)functionality to set the properties of the boxes, whiskers, fliers, medians, caps.
3. obtain the individual items of the boxes from the returned dictionary and use item.set_<property>(...)on them individually. This option is detailed in an answer to the following question: python matplotlib filled boxplots, where it allows to change the color of the individual boxes separately.

1. 通过...props关键字参数设置颜色，例如
   boxprops=dict(facecolor="red")。对于所有关键字参数，请参阅文档
2. 使用该plt.setp(item, properties)功能设置框、须、传单、中线、帽的属性。
3. 从返回的字典中获取盒子的各个项目item.set_<property>(...)并单独使用它们。此选项在对以下问题的回答中有详细说明：python matplotlib 填充 boxplots，它允许单独更改单个框的颜色。

The complete example, showing options 1 and 2:

完整示例，显示选项 1 和 2：

import matplotlib.pyplot as plt
import numpy as np
data = np.random.normal(0.1, size=(100,6))
data[76:79,:] = np.ones((3,6))+0.2

plt.figure(figsize=(4,3))
# option 1, specify props dictionaries
c = "red"
plt.boxplot(data[:,:3], positions=[1,2,3], notch=True, patch_artist=True,
            boxprops=dict(facecolor=c, color=c),
            capprops=dict(color=c),
            whiskerprops=dict(color=c),
            flierprops=dict(color=c, markeredgecolor=c),
            medianprops=dict(color=c),
            )


# option 2, set all colors individually
c2 = "purple"
box1 = plt.boxplot(data[:,::-2]+1, positions=[1.5,2.5,3.5], notch=True, patch_artist=True)
for item in ['boxes', 'whiskers', 'fliers', 'medians', 'caps']:
        plt.setp(box1[item], color=c2)
plt.setp(box1["boxes"], facecolor=c2)
plt.setp(box1["fliers"], markeredgecolor=c2)


plt.xlim(0.5,4)
plt.xticks([1,2,3], [1,2,3])
plt.show()

回答by Martin Evans

You can change the color of a box plot using setpon the returned value from boxplot()as follows:

您可以使用setp以下返回值更改箱线图的颜色boxplot()：

import matplotlib.pyplot as plt

def draw_plot(data, edge_color, fill_color):
    bp = ax.boxplot(data, patch_artist=True)

    for element in ['boxes', 'whiskers', 'fliers', 'means', 'medians', 'caps']:
        plt.setp(bp[element], color=edge_color)

    for patch in bp['boxes']:
        patch.set(facecolor=fill_color)       

example_data1 = [[1,2,0.8], [0.5,2,2], [3,2,1]]
example_data2 = [[5,3, 4], [6,4,3,8], [6,4,9]]

fig, ax = plt.subplots()
draw_plot(example_data1, 'red', 'tan')
draw_plot(example_data2, 'blue', 'cyan')
ax.set_ylim(0, 10)
plt.show()

This would display as follows:

这将显示如下：

回答by Roman Fursenko

This question seems to be similar to that one (Face pattern for boxes in boxplots) I hope this code solves your problem

这个问题似乎与那个问题相似（箱线图中的框的面部图案）我希望这段代码可以解决您的问题

import matplotlib.pyplot as plt

# fake data
d0 = [[4.5, 5, 6, 4],[4.5, 5, 6, 4]]
d1 = [[1, 2, 3, 3.3],[1, 2, 3, 3.3]]

# basic plot
bp0 = plt.boxplot(d0, patch_artist=True)
bp1 = plt.boxplot(d1, patch_artist=True)

for box in bp0['boxes']:
    # change outline color
    box.set(color='red', linewidth=2)
    # change fill color
    box.set(facecolor = 'green' )
    # change hatch
    box.set(hatch = '/')

for box in bp1['boxes']:
    box.set(color='blue', linewidth=5)
    box.set(facecolor = 'red' )

plt.show()

回答by Amjad

Change the color of a boxplot

更改箱线图的颜色

import numpy as np 
import matplotlib.pyplot as plt

#generate some random data
data = np.random.randn(200)
d= [data, data]
#plot
box = plt.boxplot(d, showfliers=False)
# change the color of its elements
for _, line_list in box.items():
    for line in line_list:
        line.set_color('r')

plt.show()