如何基于y值按降序绘制两个列表? [英] How to plot two lists in descending order based on y values?

问题描述

我有两个列表.第一个是字符串列表 a

I have two lists. The first is a list of strings a

['Agriculture/Forestry/Fisheries/Veterinary Medicine',
 'Architectural and Town Planning',
 'Business Administration and Related', ...]

，第二个是浮点列表 b

[66667.0,
22283.0,
670091.5, ...]

当我使用以下代码绘制时

When I use the following code to plot it

import matplotlib.pyplot as plt
%matplotlib inline

a = ['Agriculture/Forestry/Fisheries/Veterinary Medicine',
'Architectural and Town Planning',
'Business Administration and Related', ...]
b = [66667.0,
22283.0,
670091.5, ...]

fig = plt.figure()
ax = fig.add_subplot(111)
ax.bar(a,b)
plt.xticks(rotation=90)

条根据列表 a 中的字符串按字母顺序排列.我将如何绘制它，以便相对于列表 b 以降序排列条形?

the bars are arranged in alphabetical order according to the strings in list a. How would I plot it so that the bars are arranged in descending order with respect to list b ?

推荐答案

一个简单的数据重排方法:

A simple data rearrangement approach:

import matplotlib.pyplot as plt

a = [
    'Agriculture/Forestry/Fisheries/Veterinary Medicine',
    'Architectural and Town Planning',
    'Business Administration and Related'
]

b = [66667.0, 22283.0, 670091.5]

b, a = zip(*sorted(zip(b, a), reverse=True))  # reverse sort data on 'b'

c = range(len(b))

fig = plt.figure()
ax = fig.add_subplot(111)
ax.bar(c, b)
plt.xticks(c, a, rotation=90)
plt.show()

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