从matplotlib中的选定列绘制条形图

Question

If I have a variable hotel_type from my DataFrame and I count for the number of each different hotel_type

The following command:

`df.hotel_type.value_counts()`

gives the result:

Apartment            3157
Hotel                 115
Villa                  54
Bed and Breakfast      48
Holiday home           21

Question: How can I plot a bar chart and histogram with x-axis : hotel type and y-axis : the number of each hotel type by using matplotlib ?

Answer 1

Try with Series.plot.barh :

df.hotel_type.value_counts().plot.barh()

Update:

import numpy as np
import matplotlib.pyplot as plt

a = df.hotel_type.value_counts()

x = list(a.index)
y = list(a)

fig, ax = plt.subplots()    
width = 0.75 # the width of the bars 
ind = np.arange(len(y))  # the x locations for the groups
ax.barh(ind, y, width, color="blue")
ax.set_yticks(ind+width/2)
ax.set_yticklabels(x, minor=False)
for i, v in enumerate(y):
    ax.text(v + .25, i + .25, str(v), color='blue', fontweight='bold') #add value labels into bar
plt.title('title')
plt.xlabel('x')
plt.ylabel('y')
plt.show()