使用 pandas 创建分组的排序条形图 [英] Creating a grouped sorted bar plot using pandas

问题描述

我一直在尝试创建一个分组的排序条形图，例如一个

解决方案

 将熊猫作为pd导入#您的数据食物= {苹果作为水果":4.68，浆果":7.71，黄油":12.73，\奶酪":4.11，乳制品，其他":4.97}dframe = pd.DataFrame([food])#进行一些调整dframe = dframe.Tdframe.index.names = ['name']#添加一个索引'group'dframe ['group'] = ['fruit'，'fruit'，'other'，'other'，'other']dframe.set_index('group'，inplace = True，append = True)#取消堆叠dframe = dframe [0] .unstack(level ='group').fillna(0)#排序值dframe.sort_values(by = dframe.columns.tolist()，inplace = True，ascending = False)打印(dframe)# 阴谋dframe.plot(kind ='bar'，width = 2) 

输出如下:

 组水果其他名称浆果7.71 0.00苹果为水果4.68 0.00黄油0.00 12.73乳制品，其他0.00 4.97芝士0.00 4.11 

绘制结果

I have been trying to create a grouped sorted bar plot such as this one http://chrisalbon.com/python/matplotlib_grouped_bar_plot.html from a DataFrame created from dict by doing:

food = {'Apples as fruit': 4.68, 'Berries': 7.71, 'Butter': 12.73, 
              'Cheese': 4.11, 'Dairy, Other': 4.97}

dframe = pd.DataFrame([food])
dframe.plot(kind='bar')

    Apples as fruit  Berries     Butter    Cheese    Dairy, Other   
0   4.68             7.71        12.73     4.11      4.97   

The first group should have Apples and Berries and the second should have Butter and Cheese milk to the end. So far the above does not separate the bars(see image). How can I go about doing this as well as sorting the bars in each group?

解决方案

import pandas as pd

# your data 

food = {'Apples as fruit': 4.68, 'Berries': 7.71, 'Butter': 12.73, \
              'Cheese': 4.11, 'Dairy, Other': 4.97}

dframe = pd.DataFrame([food])

#make some adjustment

dframe = dframe.T
dframe.index.names = ['name']

# add an index 'group' 

dframe['group'] = ['fruit', 'fruit', 'other', 'other', 'other']
dframe.set_index('group', inplace=True, append=True)

# unstack

dframe = dframe[0].unstack(level='group').fillna(0)

# sort values

dframe.sort_values(by=dframe.columns.tolist(), inplace=True, ascending=False)

print(dframe) 

# plot

dframe.plot(kind='bar', width=2)

the output is like below:

   group            fruit  other
name                         
Berries           7.71   0.00
Apples as fruit   4.68   0.00
Butter            0.00  12.73
Dairy, Other      0.00   4.97
Cheese            0.00   4.11

plot result

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