[numpy] numpy.concatenate((a1,a2,...), axis=0) 数据拼接

http://blog.csdn.net/brucewong0516/article/details/79158758

concatenate((a1, a2, …), axis=0)

默认是 axis = 0 即新数据从下添加到原数据

如：

In [23]: a = np.array([[1, 2], [3, 4]])

In [24]: b = np.array([[5, 6]])

In [25]: np.concatenate((a, b), axis=0)

Out[25]:array([[1, 2],

        [3, 4],

        [5, 6]])

当axis = 1时，数据从右添加，注意维度要相适应

In [28]: np.concatenate((a, b.T ),axis = 1)

Out[28]:array([[1, 2, 5],

        [3, 4, 6]])

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