In [20]: b[0,:,1]Out[20]: array([1, 5, 9])In [21]: b[0,:,1]Out[21]: array([1, 5, 9])In [22]: b[0,:,-1]Out[22]: array([ 3,  7, 11])In [23]: b[0,::-1, -1]Out[23]: array([11,  7,  3])In [24]: b[0,::-2, -1]Out[24]: array([11,  3])In [25]: b[::-1]Out[25]:array([[[12, 13, 14, 15],        [16, 17, 18, 19],        [20, 21, 22, 23]],       [[ 0,  1,  2,  3],        [ 4,  5,  6,  7],        [ 8,  9, 10, 11]]])In [26]: bOut[26]:array([[[ 0,  1,  2,  3],        [ 4,  5,  6,  7],        [ 8,  9, 10, 11]],       [[12, 13, 14, 15],        [16, 17, 18, 19],        [20, 21, 22, 23]]])In [27]: b.ravel()Out[27]:array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16,       17, 18, 19, 20, 21, 22, 23])In [28]: b.flatten()Out[28]:array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16,       17, 18, 19, 20, 21, 22, 23])In [29]: b.shape = (6,4)In [30]: bOut[30]:array([[ 0,  1,  2,  3],       [ 4,  5,  6,  7],       [ 8,  9, 10, 11],       [12, 13, 14, 15],       [16, 17, 18, 19],       [20, 21, 22, 23]])In [31]: b.transpose()Out[31]:array([[ 0,  4,  8, 12, 16, 20],       [ 1,  5,  9, 13, 17, 21],       [ 2,  6, 10, 14, 18, 22],       [ 3,  7, 11, 15, 19, 23]])In [32]: b.resize(2,12))  File "
     
      ", line 1    b.resize(2,12))                  ^SyntaxError: invalid syntaxIn [33]: b.resize((2,12))In [34]: bOut[34]:array([[ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11],       [12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23]])In [35]: a = arange(3).reshape(3,3)---------------------------------------------------------------------------ValueError                                Traceback (most recent call last)
      
        in 
       
        ()----> 1 a = arange(3).reshape(3,3)ValueError: cannot reshape array of size 3 into shape (3,3)In [36]: a = arange(9).reshape(3,3)In [37]: aOut[37]:array([[0, 1, 2],       [3, 4, 5],       [6, 7, 8]])In [38]: b = 2 * aIn [39]: bOut[39]:array([[ 0,  2,  4],       [ 6,  8, 10],       [12, 14, 16]])In [40]: hstack((a,b))Out[40]:array([[ 0,  1,  2,  0,  2,  4],       [ 3,  4,  5,  6,  8, 10],       [ 6,  7,  8, 12, 14, 16]])In [41]: concatenate((a,b), axis=1)Out[41]:array([[ 0,  1,  2,  0,  2,  4],       [ 3,  4,  5,  6,  8, 10],       [ 6,  7,  8, 12, 14, 16]])In [42]: vstack((a,b))Out[42]:array([[ 0,  1,  2],       [ 3,  4,  5],       [ 6,  7,  8],       [ 0,  2,  4],       [ 6,  8, 10],       [12, 14, 16]])In [43]: concatenate((a,b), axis=0)Out[43]:array([[ 0,  1,  2],       [ 3,  4,  5],       [ 6,  7,  8],       [ 0,  2,  4],       [ 6,  8, 10],       [12, 14, 16]])In [44]: dstack((a,b))Out[44]:array([[[ 0,  0],        [ 1,  2],        [ 2,  4]],       [[ 3,  6],        [ 4,  8],        [ 5, 10]],       [[ 6, 12],        [ 7, 14],        [ 8, 16]]])In [45]: aOut[45]:array([[0, 1, 2],       [3, 4, 5],       [6, 7, 8]])In [46]: hsplit(a, 3)Out[46]:[array([[0],        [3],        [6]]), array([[1],        [4],        [7]]), array([[2],        [5],        [8]])]In [47]: hsplit(a, 3)Out[47]:[array([[0],        [3],        [6]]), array([[1],        [4],        [7]]), array([[2],        [5],        [8]])]In [48]: split(a, 3, axis=1)Out[48]:[array([[0],        [3],        [6]]), array([[1],        [4],        [7]]), array([[2],        [5],        [8]])]In [49]: vsplit(a, 3)Out[49]: [array([[0, 1, 2]]), array([[3, 4, 5]]), array([[6, 7, 8]])]In [50]: split(a, 3, axis=0)Out[50]: [array([[0, 1, 2]]), array([[3, 4, 5]]), array([[6, 7, 8]])]In [51]: c = arange(27).reshape(3, 3, 3)In [52]: cOut[52]:array([[[ 0,  1,  2],        [ 3,  4,  5],        [ 6,  7,  8]],       [[ 9, 10, 11],        [12, 13, 14],        [15, 16, 17]],       [[18, 19, 20],        [21, 22, 23],        [24, 25, 26]]])In [53]: dsplit(c,3)Out[53]:[array([[[ 0],         [ 3],         [ 6]],        [[ 9],         [12],         [15]],        [[18],         [21],         [24]]]), array([[[ 1],         [ 4],         [ 7]],        [[10],         [13],         [16]],        [[19],         [22],         [25]]]), array([[[ 2],         [ 5],         [ 8]],        [[11],         [14],         [17]],        [[20],         [23],         [26]]])]In [54]: bOut[54]:array([[ 0,  2,  4],       [ 6,  8, 10],       [12, 14, 16]])In [55]: bOut[55]:array([[ 0,  2,  4],       [ 6,  8, 10],       [12, 14, 16]])In [56]: b.ndimOut[56]: 2In [57]: b.sizeOut[57]: 9In [58]: b.itemsizeOut[58]: 4In [59]: b.nbytesOut[59]: 36In [60]: b.size * b.itemsizeOut[60]: 36In [61]: b.resize(6,4)---------------------------------------------------------------------------ValueError                                Traceback (most recent call last)
        
          in 
         
          ()----> 1 b.resize(6,4)ValueError: cannot resize an array that references or is referencedby another array in this way.  Use the resize functionIn [62]: b.resize(6,6)---------------------------------------------------------------------------ValueError                                Traceback (most recent call last)
          
            in 
           
            ()----> 1 b.resize(6,6)ValueError: cannot resize an array that references or is referencedby another array in this way. Use the resize functionIn [63]: b.resize()In [64]: bOut[64]:array([[ 0, 2, 4], [ 6, 8, 10], [12, 14, 16]])In [65]: bOut[65]:array([[ 0, 2, 4], [ 6, 8, 10], [12, 14, 16]])In [66]: b.tolist()Out[66]: [[0, 2, 4], [6, 8, 10], [12, 14, 16]]In [67]: