python用matplotlib畫折線圖

折線圖： 
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\nCheck it out') 
plt.legend() 
plt.show() 


條形圖

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\nCheck it out') plt.legend() plt.show()

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直方圖：

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\nCheck it out') plt.legend() plt.show()

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散點圖：

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\nCheck it out') plt.legend() plt.show()

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