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Split an array into multiple sub-arrays as views into `ary`.
Parameters
----------
ary : ndarray
Array to be divided into sub-arrays.
indices_or_sections : int or 1-D array
If `indices_or_sections` is an integer, N, the array will be divided
into N equal arrays along `axis`. If such a split is not possible,
an error is raised.
If `indices_or_sections` is a 1-D array of sorted integers, the entries
indicate where along `axis` the array is split. For example,
``[2, 3]`` would, for ``axis=0``, result in
- ary[:2]
- ary[2:3]
- ary[3:]
If an index exceeds the dimension of the array along `axis`,
an empty sub-array is returned correspondingly.
axis : int, optional
The axis along which to split, default is 0.
Returns
-------
例子1
arr= np.arange(9.0)
np.split(arr,3)# 打印输出[array([0.,1.,2.]), array([3.,4.,5.]), array([6.,7.,8.])]
例子2
arr= np.arange(8.0)
np.split(arr,[3,5,6,10])# 打印输出[array([0.,1.,2.]), array([3.,4.]), array([5.]), array([6.,7.]), array([], dtype=float64)]