如何繪製水平條形圖中的Counter對象？

Question

我有一個Counter對象。我想繪製一個這樣的水平條形圖http://matplotlib.org/examples/lines_bars_and_markers/barh_demo.html

我該怎麼做？

Answer 1

這是從頁的例子中你提到修改爲使用計數器對象：

""" 
Simple demo of a horizontal bar chart. 
""" 
import matplotlib.pyplot as plt; plt.rcdefaults() 
import numpy as np 
import matplotlib.pyplot as plt 


# Counter data, counter is your counter object 
keys = counter.keys() 
y_pos = np.arange(len(keys)) 
# get the counts for each key, assuming the values are numerical 
performance = [counter[k] for k in keys] 
# not sure if you want this :S 
error = np.random.rand(len(keys)) 

plt.barh(y_pos, performance, xerr=error, align='center', alpha=0.4) 
plt.yticks(y_pos, keys) 
plt.xlabel('Counts per key') 
plt.title('How fast do you want to go today?') 

plt.show()