箱线由另一个大熊猫分组/ matplotlib

Question

比方说，我有这样一个数据帧：

species,weight 
lion,130 
lion,190 
giraffe,803 
lion,150 
giraffe,1200 
hippo,1300 
giraffe,1000 
hippo,1800 
giraffe,1100 
lion,160 

有每个物种的动物（少了，不好意思的不同号码 - 少 - 河马，为例）。我想制作一个箱形图，显示每种物种的体重分布。如何？

Answer 1

df.boxplot(by = 'species', vert = False) 

Answer 2

import matplotlib.pyplot as plt 
import numpy as np 

# fake up some data 
spread = np.random.rand(50) * 100 
center = np.ones(25) * 50 
flier_high = np.random.rand(10) * 100 + 100 
flier_low = np.random.rand(10) * -100 
data = np.concatenate((spread, center, flier_high, flier_low), 0) 

# basic plot 
plt.boxplot(data) 

# notched plot 
plt.figure() 
plt.boxplot(data, 1) 


# horizontal boxes 
plt.figure() 
plt.boxplot(data, 0, 'rs', 0) 

# change whisker length 
plt.figure() 
plt.boxplot(data, 0, 'rs', 0, 0.75) 

# fake up some more data 
spread = np.random.rand(50) * 100 
center = np.ones(25) * 40 
flier_high = np.random.rand(10) * 100 + 100 
flier_low = np.random.rand(10) * -100 
d2 = np.concatenate((spread, center, flier_high, flier_low), 0) 
data.shape = (-1, 1) 
d2.shape = (-1, 1) 

plt.show() 

不是Matplotlib的专家，但我在网上发现了这个代码，它对我来说很好看。我只是把你的价值观放在数据部分。