import matplotlib.pyplot as plt
%matplotlib notebook
%matplotlib inline
plt.plot([1,2,3,4],[1,4,9,16],'m')
plt.ylabel('y')

plt.plot([1,2,3,4],[1,4,9,16],'ro')

import numpy as np
t = np.arange(0.,5.,0.2)#从0到4.8
plt.plot(t,t,'r--',
t,t**2,'bs',
t,t**3,'go')

x = np.linspace(-np.pi,np.pi)
y = np.sin(x)
y1 = np.cos(x)
plt.plot(x,y,'r',
x,y1, 'g')

l1,l2 = plt.plot(x,y,'r-',x,y+1**2,'b-')
l1.set_antialiased(False)#可以只设置其中一条线

line = plt.plot(x,y)
plt.setp(line,color = 'g',linewidth = 4)

plt.figure()
plt.subplot(4,3,2)
plt.subplot(4,3,12)

def f(t):
return np.exp(-t)*np.cos(2*np.pi*t)
t1 = np.arange(0.,5.,0.1)
t2 = np.arange(0.,5.,0.02)
plt.figure(figsize = (10,6))
plt.subplot(211)
plt.plot(t1,f(t1),'bo',t2,f(t2),'k')
plt.subplot(212)
plt.plot(t2,np.cos(2*np.pi*t2),'r--')
