numpy.repeat(a, repeats, axis=None)
>>> a = np.arange(3)
>>> a
array([0, 1, 2])
>>> np.repeat(a, 2)
array([0, 0, 1, 1, 2, 2])
>>> a = np.array([[1,2],[3,4]])
>>> a
array([[1, 2],
[3, 4]])
>>> np.repeat(a, 2, 1)
array([[1, 1, 2, 2],
[3, 3, 4, 4]])
>>> np.repeat(a, 2, 0)
array([[1, 2],
[1, 2],
[3, 4],
[3, 4]])
tile函数功能：对整个数组进行复制拼接
>>> a
array([[1, 2],
[3, 4]])
>>> np.tile(a, 2)
array([[1, 2, 1, 2],
[3, 4, 3, 4]])
原文：https://www.cnblogs.com/573177885qq/p/10320405.html