Python draw histograms / bar graph / histogram

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1. single bar graph and digital display

import matplotlib.pyplot as plt

name_list = ['lambda=0', 'lambda=0.05', 'lambda=0.1', 'lambda=0.5']
num_list = [52.4, 57.8, 59.1, 54.6]
rects=plt.bar(range(len(num_list)), num_list, color='rgby')
# X轴标题
index=[0,1,2,3]
index=[float(c)+0.4 for c in index]
plt.ylim(ymax=80, ymin=0)
plt.xticks(index, name_list)
plt.ylabel("arrucay(%)") #X轴标签
for rect in rects:
    height = rect.get_height()
    plt.text(rect.get_x() + rect.get_width() / 2, height, str(height)+'%', ha='center', va='bottom')
plt.show()

　　

2. Draw a bar graph comparing Chinese display marked and saved as a picture

 

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