import pandas as pd
num=[200,300,400,600,1000]
df=pd.DataFrame(num)
print(df.describe())
df0=(df-df.min())/(df.max()-df.min()) #离差标准化
print(df0)
print(df.mean()) #标准差标准化
df1=(df-df.mean())/df.std()
print(df1)
df2=(df/(10**4)) #小数定标标准化
print(df2)