import matplotlib.pyplot as plt
import numpy as np
plt.plot([1,4,9],[5,5,5])
plt.show()
“”"
@Theme matplotlib
@author lz
@Time 2018/12/10
@content figure
“”"
import matplotlib.pyplot as plt
import numpy as np
x=np.arange(-3,3,0.1)#區間為-3到3，間隔長度為0.1
y1=np.sin(x)
y2=np.cos(x)
plt.figure()
plt.plot(x,y1)
#改變figure的名稱
plt.figure(num=5,figsize=(5,4))
plt.plot(x,y2)
plt.show()

import matplotlib.pyplot as plt
import numpy as np
x=np.arange(-3,3,0.1)
y1=np.sin(x)
y2=np.cos(x)
plt.plot(x,y1,color=“red”,linestyle="-",marker=“o”,markersize=10,alpha=0.5)
plt.show()
“”"
@Theme matplotlib
@author lz
@Time 2018/12/11
@content 兩個影象在一張圖上顯示
“”"
import matplotlib.pyplot as plt
import numpy as np
import matplotlib as mpl
mpl.rcParams[‘font.sans-serif’] = [‘SimHei’]
mpl.rcParams[‘axes.unicode_minus’] = False

x1=np.arange(1,10,1)
y1=x1+1
x2=[2,4.6]
y2=x2
plt.plot(x1,y1)
plt.plot(x2,y2)
#建立影象
plt.figure()
plt.subplot(221)
plt.plot(x1,y1,“ro–”)
plt.subplot(223)
plt.plot(x2,y2,“bo–”)
plt.show()

“”"
@Theme matplotlib
@author lz
@Time 2018/12/11
@content 利用面向物件兩個影象在一張圖上顯示
利用建立的物件來呼叫方法，繪圖
“”"
import matplotlib.pyplot as plt
import numpy as np
import matplotlib as mpl
mpl.rcParams[‘font.sans-serif’] = [‘SimHei’]
mpl.rcParams[‘axes.unicode_minus’] = False
fig=plt.figure(figsize=(8,6))
#在figure上建立物件
ax1=fig.add_subplot(221)
ax2=fig.add_subplot(222)
ax3=fig.add_subplot(212)
#在ax1,ax2,ax3上繪圖
ax1.plot(np.random.rand(50).cumsum(),“g-”)
ax2.plot(np.random.rand(50).cumsum(),“b–”)
ax3.plot(np.random.rand(50).cumsum(),“k-”)
plt.show()