使用numpy与matplotlib.pyplot画图
1. 折线图
1 # -*- enccoding:utf-8 -*- 2 import numpy as np 3 import matplotlib.pyplot as plt 4 plt.rcParams['font.family'] = 'SimHei' #用来正常显示中文 5 plt.rcParams['font.sans-serif'] = ['SimHei'] #用来正常显示中文 6 plt.rcParams['axes.unicode_minus'] = False #用来正常显示负号 7 fig = plt.figure() 8 ph = fig.add_subplot(1,1,1) 9 x = range(100) 10 y = np.cos(x) * np.sin(x)**2 * 200 11 ph.plot(x,y,'y-') 12 ph.set_xticks([0,25,50,75,100]) 13 ph.set_title("步平凡的声音频率") 14 ph.set_xlabel('Time') 15 ph.set_ylabel('Hz') 16 plt.show()
2. 等高线
1 import matplotlib.pyplot as plt 2 import numpy as np 3 def f(x,y): 4 return (1-x/2+x**5+y**3)*np.exp(-x**2-y**2)*1000 5 plt.rcParams['font.family'] = 'KaiTi' #用来正常显示中文 6 plt.rcParams['font.sans-serif'] = ['SimHei'] #用来正常显示中文 7 plt.rcParams['axes.unicode_minus'] = False #用来正常显示负号 8 9 x = np.linspace(-3,3,256) 10 y = np.linspace(-3,3,256) 11 X,Y = np.meshgrid(x,y) 12 13 plt.contourf(X, Y, f(X,Y), 8, alpha=.75, cmap=plt.cm.hot) 14 C = plt.contour(X, Y, f(X,Y), 8, colors='black') 15 16 #plt.clabel(C, inline=1, fontsize=10) 17 plt.title("步平凡火焰山") 18 plt.show()
