python - 我如何把它变成一个 numpy 矩阵？

Question

如何转动数组 a = [[[1, 2, 3, 4], [5, 6, 7, 8]], [[9, 10, 11, 12], [ 13, 14, 15, 16]]]] 转换为

形式的 numpy 矩阵

[[1,2,3,4],
[5,6,7,8],
[9,10,11,12],
[13,14,15,16]]

?我试过 np.bmat(a) 无济于事。当我这样做时，我得到一个 2x6 矩阵。

Answer 1

使用np.array 构造数组，然后reshape 将其塑造成正确的形状:

>>> np.array([[[[1, 2, 3, 4], [5, 6, 7, 8]], [[9, 10, 11, 12], [13, 14, 15, 16]]]]).reshape((4,4))
array([[ 1,  2,  3,  4],
       [ 5,  6,  7,  8],
       [ 9, 10, 11, 12],
       [13, 14, 15, 16]])