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Methods of normalizing data



The main three methods of normalizing data are:   

  • Simple Feature Scaling[0,1]                              \[X_{new} = \frac{X_{old}}{X_{max}}\]
 The Code: 
   
df["column_name"] = df["column_name"]/df["column_name"].max()
  • Min_Max[0,1]               \[X_{new} = \frac{X_{old} - X_{min}}{X_{max} - X_{min}}\]
The Code:  
(df["column_name"]-df["column_name"].min/(df["column_name"].max()-df["column_name"].min())
 

  • Z-Score[-3,3]      \[X_{new} = \frac{X_{old} - averag of features}{Standard deviation (sigma)}\]
The Code: 
df["column_name"] = (df["column_name"] -df["column_name"].mean()/df["column_name"].std()



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About Inas AL-Kamachy

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