python用matplotlib画折线图

折线图： 
import matplotlib.pyplot as plt 
y1=[10,13,5,40,30,60,70,12,55,25] 
x1=range(0,10) 
x2=range(0,10) 
y2=[5,8,0,30,20,40,50,10,40,15] 
plt.plot(x1,y1,label='Frist line',linewidth=3,color='r',marker='o', 
markerfacecolor='blue',markersize=12) 
plt.plot(x2,y2,label='second line') 
plt.xlabel('Plot Number') 
plt.ylabel('Important var') 
plt.title('Interesting Graph Check it out') 
plt.legend() 
plt.show() 


条形图

import matplotlib.pyplot as plt
y1=[10,13,5,40,30,60,70,12,55,25]
x1=range(0,20,2)
x2=range(1,21,2)
y2=[5,8,0,30,20,40,50,10,40,15]
plt.bar(x1,y1,label='Frist line')
#plt.bar(x2,y2,label='second line',color='r')
plt.xlabel('Plot Number')
plt.ylabel('Important var')
plt.title('Interesting Graph
Check it out')
plt.legend()
plt.show()

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直方图：

import matplotlib.pyplot as plt
population_ages = [22,55,62,45,21,22,34,42,42,4,99,102,
                   110,120,121,122,130,111,115,112,80,75,
                   65,54,44,43,42,48]
x=range(0,130,10)
plt.hist(population_ages,x,rwidth=0.8,color='r',histtype='stepfilled')

plt.xlabel('Plot Number')
plt.ylabel('Important var')
plt.title('Interesting Graph
Check it out')
plt.legend()
plt.show()

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散点图：

import matplotlib.pyplot as plt
population_ages = [22,55,62,45,21,22,34,42,42,4,99,102,
                   110,120,121,122,130,111,115,112,80,75,
                   65,54,44,43,42,48]
x=range(0,len(population_ages))
plt.scatter(x,population_ages,label='frist label',s=20)
help(plt.scatter)
plt.xlabel('x')
plt.ylabel('y')
plt.title('Interesting Graph
Check it out')
plt.legend()
plt.show()

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