numpy.append()里的axis的用法

 

a1=[[1,2,3],[1.1,1.2,1.3]]
b1=[[4,5,6],[4.1,4.2,4.3]]
c1=np.append(a1,b1,axis=0)
print(c1)
c2=np.append(a1,b1,axis=1)
print(c2)

 

[[1.  2.  3. ]
 [1.1 1.2 1.3]
 [4.  5.  6. ]
 [4.1 4.2 4.3]]
[[1.  2.  3.  4.  5.  6. ]
 [1.1 1.2 1.3 4.1 4.2 4.3]]