Normalization vs Standadization

Asked Sep 14 '18 at 12:32

Active Sep 16 '18 at 08:12

Viewed 1,831 times

Of the two best known techniques for feature scaling in Machine Learning:

Normalizing a feature to a $[0, 1]$ range, through $x - x_{min} \over x_{max} - x_{min}$

Standardizing the feature (also referred to as z-score), through $x - μ \over σ$, where $μ$ is the mean and $σ$ is the standard deviation.

Is there any reason to prefer one over the other? Does any one outperform the other when used with certain algorithms?

edited Sep 16 '18 at 08:12

asked Sep 14 '18 at 12:32

kfn95

1

It depends on the objective. – user2974951 Sep 14 '18 at 12:32
@user2974951 Is there any case where one is preferred over the other? Or does one have any useful properties compared to the other? – kfn95 Sep 14 '18 at 12:35
Your comment makes me believe this is a possible duplicate of Is it a good practice to always scale/normalize data for machine learning? – Frans Rodenburg Sep 14 '18 at 12:53
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@FransRodenburg The author asks which feature scaling to perform, while the question you referenced is about whether or not to use feature scaling. I think it's a valid question. – Sep 14 '18 at 14:17
@JohnDoe I realise the difference in titles, but if you read the accepted answer you'll see that it is more similar than it might seem at first. – Frans Rodenburg Sep 14 '18 at 14:19

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