批归一化

import pandas as pd
import numpy as np
import math

data = pd.read_csv('c:\housing.csv')

room_nums = data['total_rooms'].tolist()

room_mean = np.mean(room_nums)

room_var = np.var(room_nums)

print('%f %f' % (room_mean, room_var))

new_room = [(x-room_mean)/math.sqrt(room_var+0.001) for x in room_nums]

print(new_room)