绘制默认sin曲线图

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# -*- coding: utf-8 -*-
"""
Created on Thu Oct 11 16:05:52 2018

@author: Administrator
"""


'''
绘制默认sin曲线图
'''

#设置x,y的值
import numpy as np 
x = np.linspace(0  , 4*np.pi)  #x为0~4π
y = np.sin(x)                  #y为sin(x)

#绘图
import matplotlib.pyplot as plt
plt.plot(  x ,  y ,  label="$sin(x)$" )
plt.title('sin')

#保存并展示图片
plt.savefig('./sin(x).png')
plt.show()

修改显示的曲线的线条

#设置x,y的值
import numpy as np 
x = np.linspace(0  , 4*np.pi)  #x为0~4π
y = np.sin(x)                  #y为sin(x)

#绘图
import matplotlib.pyplot as plt

#修改线条
plt.rcParams['lines.linestyle'] = '-.'
plt.rcParams['lines.linewidth'] = 3

plt.plot(  x ,  y ,  label="$sin(x)$" )
plt.title('sin')

#保存并展示图片
plt.savefig('./sin(x).png')
plt.show()