python利用matplotlib画图_python画图matplotlib

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

效果展示：

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

 效果展示：

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

 效果展示：

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

效果展示：

五、饼图

import matplotlib.pyplot as plt
import numpy as np
 
y = np.array([35, 25, 25, 15])
 
plt.pie(y,
        labels=['A','B','C','D'], # 设置饼图标签
        colors=["#d5695d", "#5d8ca8", "#65a479", "#a564c9"], # 设置饼图颜色
        explode=(0, 0.2, 0, 0), # 第二部分突出显示，值越大，距离中心越远
        autopct='%.2f%%', # 格式化输出百分比
       )
plt.title("RUNOOB Pie Test")
plt.show()

效果展示：

 

六、网线图

import numpy as np
import matplotlib.pyplot as plt
 
x = np.array([1, 2, 3, 4])
y = np.array([1, 4, 9, 16])
 
 
plt.title("RUNOOB grid() Test")
plt.xlabel("x - label")
plt.ylabel("y - label")
 
plt.plot(x, y)
 
plt.grid(color = 'r', linestyle = '--', linewidth = 0.5)
 
plt.show()

  效果展示：

 七、柱状图

import matplotlib.pyplot as plt
import numpy as np
 
x = np.array(["Runoob-1", "Runoob-2", "Runoob-3", "C-RUNOOB"])
y = np.array([12, 22, 6, 18])
 
plt.bar(x,y)
plt.show()

效果展示：

 

八、绘制多图

import matplotlib.pyplot as plt
import numpy as np
 
#plot 1:
x = np.array([0, 6])
y = np.array([0, 100])
 
plt.subplot(2, 2, 1)
plt.plot(x,y)
plt.title("plot 1")
 
#plot 2:
x = np.array([1, 2, 3, 4])
y = np.array([1, 4, 9, 16])
 
plt.subplot(2, 2, 2)
plt.plot(x,y)
plt.title("plot 2")
 
#plot 3:
x = np.array([1, 2, 3, 4])
y = np.array([3, 5, 7, 9])
 
plt.subplot(2, 2, 3)
plt.plot(x,y)
plt.title("plot 3")
 
#plot 4:
x = np.array([1, 2, 3, 4])
y = np.array([4, 5, 6, 7])
 
plt.subplot(2, 2, 4)
plt.plot(x,y)
plt.title("plot 4")
 
plt.suptitle("RUNOOB subplot Test")
plt.show()

 效果展示：