标准化与归一化

标准化(Standardization)

是按某个维度进行标准化，例如有下面的矩阵

>>> X = np.array([[ 1., -1.,  2.],
...               [ 2.,  0.,  0.],
...               [ 0.,  1., -1.]])

array([[ 0.  ..., -1.22...,  1.33...],
       [ 1.22...,  0.  ..., -0.26...],
       [-1.22...,  1.22..., -1.06...]])

归一化(Normalization)

array([[ 0.40..., -0.40...,  0.81...],
       [ 1.  ...,  0.  ...,  0.  ...],
       [ 0.  ...,  0.70..., -0.70...]])

标准化与归一化

原文：http://blog.csdn.net/lming_08/article/details/41915367