NumPy之Tiling arrays重复数组/元素

numpy.tile(A, reps)
通过重复rep给出的次数来构造array

>>> a = np.array([0, 1, 2])
>>> np.tile(a, 2)
array([0, 1, 2, 0, 1, 2])

>>> np.tile(a, (2, 1))
array([[0, 1, 2],
       [0, 1, 2]])

numpy.repeat(a, repeats, axis=None)
重复数组的元素

>>> np.repeat(3, 4)
array([3, 3, 3, 3])


>>> x = np.array([[1,2],[3,4]])
>>> np.repeat(x, 2)
array([1, 1, 2, 2, 3, 3, 4, 4])

>>> repeat(x,2,axis=0) 
array([[1, 2],
       [1, 2],
       [3, 4],
       [3, 4]])
>>> repeat(x,2,axis=1) 
array([[1, 1, 2, 2],
       [3, 3, 4, 4]])


>>> repeat(x, [1, 2], axis=0) 
array([[1, 2],
       [3, 4],
       [3, 4]])
>>> repeat(x, [2, 1], axis=0) 
array([[1, 2],
       [1, 2],
       [3, 4]])

tile()- 重复array
repeat()- 重复arry中的元素