Python中的axis=0,axis=1

转自

http://blog.csdn.net/rango_lhl/article/details/50542887

axis=0表述列 
axis=1表述行

如下面例子：

In [52]: arr=np.arange(12).reshape((3,4))In [53]:arrOut[53]:array([[ 0,  1,  2,  3],       [ 4,  5,  6,  7],       [ 8,  9, 10, 11]])In [54]:np.concatenate([arr,arr],axis=0)Out[54]:array([[ 0,  1,  2,  3],       [ 4,  5,  6,  7],       [ 8,  9, 10, 11],       [ 0,  1,  2,  3],       [ 4,  5,  6,  7],       [ 8,  9, 10, 11]])In [55]:np.concatenate([arr,arr],axis=1)Out[55]:array([[ 0,  1,  2,  3,  0,  1,  2,  3],       [ 4,  5,  6,  7,  4,  5,  6,  7],       [ 8,  9, 10, 11,  8,  9, 10, 11]])
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