Python 数据清洗--处理Nan

Posted 2021-11-25 ann21

参考：http://blog.sina.com.cn/s/blog_13050351e0102xfis.html
https://www.sogou.com/link?url=DOb0bgH2eKh1ibpaMGjuy-bS_O7xQYLPIOogrOFmc02ueKW9M67CaVLpMY1k7wxTCB1NmnNSzM-t5pUc3zy0dg..
https://www.sogou.com/link?url=DOb0bgH2eKh1ibpaMGjuy6YnbQPc3cuKWH5w_8iuvJBomuBEhdSpHkUUZED5fr2OXwl-dB-nkEs_c1NbUyGLxQ..
https://jingyan.baidu.com/article/ca00d56c1b3647e99eebcfbd.html

`import numpy as np

import pandas as pd
from pandas import Series,DataFrame
from numpy import nan as NaN

import tensorflow as tf
import matplotlib.pyplot as plt

import scipy.io as sio
import os

from sklearn import preprocessing

读取mat数据
load_path="08_1.mat"
load_data = sio.loadmat(load_path)
a = load_data[‘D‘]
print(a)

data = DataFrame(a)
print(data)

data.fillna(0)
print(data.fillna(0))

b=data.fillna(0).values
print(b)

数据归一化
a2 = preprocessing.scale(b)
print(‘数据归一化：‘)
print(a2)

数据清洗方法2 删除NAN所在的列

load_path2="08_1.mat"
load_data2 = sio.loadmat(load_path2)
a2 = load_data2[‘D‘]

print(a2)

data2 = DataFrame(a2)
data2.dropna(axis=0, how=‘any‘)

print(data2.dropna(axis=0, how=‘any‘))`

处理前：

处理后：