1 In[86]: a,b 2 Out[86]: (array([1, 2, 3]), array([4, 5, 6])) 3 In[87]: np.concatenate((a,b),axis=0) 4 Out[87]: array([1, 2, 3, 4, 5, 6]) 5 In[88]: np.concatenate((a,b),axis=1) 6 Out[88]: array([1, 2, 3, 4, 5, 6]) 7 In[89]: np.vstack((a,b)) 8 Out[89]: 9 array([[1, 2, 3], 10 [4, 5, 6]]) 11 In[90]: np.hstack((a,b)) 12 Out[90]: array([1, 2, 3, 4, 5, 6]) 13 In[93]: a1 14 Out[93]: 15 array([[1, 2, 3], 16 [4, 5, 6]]) 17 In[94]: a2 18 Out[94]: 19 array([[ 7, 8, 9], 20 [10, 11, 12]]) 21 In[95]: np.concatenate((a1,a2),axis=0) 22 Out[95]: 23 array([[ 1, 2, 3], 24 [ 4, 5, 6], 25 [ 7, 8, 9], 26 [10, 11, 12]]) 27 In[96]: np.concatenate((a1,a2),axis=1) 28 Out[96]: 29 array([[ 1, 2, 3, 7, 8, 9], 30 [ 4, 5, 6, 10, 11, 12]]) 31 In[97]: np.vstack((a1,a2)) 32 Out[97]: 33 array([[ 1, 2, 3], 34 [ 4, 5, 6], 35 [ 7, 8, 9], 36 [10, 11, 12]]) 37 In[98]: np.hstack((a1,a2)) 38 Out[98]: 39 array([[ 1, 2, 3, 7, 8, 9], 40 [ 4, 5, 6, 10, 11, 12]])