matplotlib.pyplot画图包的使用简介 (4) [柱状图]

 

 

 

import matplotlib.pyplot as plt

plt.rcParams["font.family"] = 'SimHei'  # 将字体改为中文
plt.rcParams['axes.unicode_minus'] = False                  # 设置了中文字体默认后，坐标的"-"号无法显示，设置这个参数就可以避免

y1 = [5,9,1,20,15,31]
y2 = [-5,-9,-1,-20,-5,-1]

plt.bar(range(len(y1)),y1,width=0.8,facecolor = 'b',edgecolor = 'white',label='柱状图1')
plt.bar(range(len(y2)),y2,width=0.8,facecolor = 'g',edgecolor = 'white',label='柱状图2')
plt.legend()

plt.title('柱状图示例')
plt.show()