matplotlib绘图教程与样例代码

# encoding: utf-8 """ Author: 沙振宇 CreateTime: 2019-4-29 UpdateTime: 2019-12-12 Info: matplotlib 使用示例 —— 柱形图 """ import numpy as np import matplotlib.pyplot as plt #柱状图 A1 = [0.88,0.81,0.85] A2 = [0.89,0.86,0.84] A3 = [0.88,0.83,0.89] A4 = [0.86,0.86,0.88] A5 = [0.90,0.83,0.83] x = np.arange(3) #总共有几组，就设置成几，我们这里有三组，所以设置为3 total_width, n = 0.6, 5 # n有多少个类型 width = total_width / n x = x - (total_width - width) / 2 plt.bar(x, A1, color = "r",width=width,label='a1 ') plt.bar(x + width, A2, color = "y",width=width,label='a2') plt.bar(x + 2 * width, A3 , color = "c",width=width,label='a3') plt.bar(x + 3 * width, A4 , color = "g",width=width,label='a4') plt.bar(x + 4 * width, A5 , color = "b",width=width,label='a5') plt.xlabel("横轴的名字") plt.ylabel("纵轴的名字") plt.legend(loc = "best") plt.xticks([0,1,2],['左边','中间','右边']) plt.ylim((0.8, 0.95)) my_y_ticks = np.arange(0.8, 0.95, 0.02) plt.yticks(my_y_ticks) plt.rcParams['font.sans-serif']=['SimHei'] # 中文 plt.show()