[numpy]split()和array_split()

概述：

可以用于把narray分成几份。

示例：

numpy.plit(ary, indices_or_sections, axis=0)

>>> x = np.arange(9.0)
>>> np.split(x, 3)
[array([ 0.,  1.,  2.]), array([ 3.,  4.,  5.]), array([ 6.,  7.,  8.])]

>>> x = np.arange(8.0)
>>> np.split(x, [3, 5, 6, 10])
[array([ 0.,  1.,  2.]), array([ 3.,  4.]), array([ 5.]), array([ 6.,  7.]), array([], dtype=float64)]

numpy.array_split(ary, indices_or_sections, axis=0)

功能与split一样，唯一的区别是 array_split allows indices_or_sections to be an integer that does not equally divide the axis.

>>> x = np.arange(8.0)
>>> np.array_split(x, 3)
[array([ 0.,  1.,  2.]), array([ 3.,  4.,  5.]), array([ 6.,  7.])]

参考：

split():http://docs.scipy.org/doc/numpy/reference/generated/numpy.split.html

array_aplit():http://docs.scipy.org/doc/numpy/reference/generated/numpy.array_split.html