python数据可视化03

一：正弦曲线与余弦曲线图

import numpy as np
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False
x =np.linspace(-np.pi,np.pi,256,endpoint=True)
y1,y2 = np.sin(x),np.cos(x)
plt.plot(x,y1,x,y2)
plt.xlabel("x轴")
plt.ylabel("y轴")
plt.title(2020080603049)
plt.show()

二设置刻度范围和刻度标签

plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False
x =np.linspace(-np.pi,np.pi,256,endpoint=True)
y1,y2 = np.sin(x),np.cos(x)
plt.xlim(x.min() * 1.5, x.max()  * 1.5)
plt.xticks([-np.pi, -np.pi/2, 0, np.pi/2, np.pi], [r'$-\pi$', r'$-\pi/2$',
                                                       r'$0$', r'$\pi/2$', r'$\pi$'])

plt.plot(x,y1,x,y2)
plt.xlabel("x轴")
plt.ylabel("y轴")
plt.title(2020080603049)
plt.show()

三：添加图例

import numpy as np
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False
x = np.linspace(-np.pi, np.pi, 256, endpoint=True)
y1, y2 = np.sin(x), np.cos(x)
lines = plt.plot(x, y1, x, y2)
plt.xlabel("x轴")
plt.ylabel("y轴")
plt.xlim(x.min() * 1.5, x.max()  * 1.5)
plt.xticks([-np.pi, -np.pi/2, 0, np.pi/2, np.pi], [r'$-\pi$', r'$-\pi/2$',
                                                       r'$0$', r'$\pi/2$', r'$\pi$'])
plt.title("正弦曲线和余弦曲线")
plt.legend(lines, ['正弦', '余弦'], shadow=True, fancybox=True)
plt.show()

四：显示水平网格

plt.rcParams