4 Ways to Normalize and Scale Features for Regression Modeling

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Common Transformations

Log Transformation

If you have data that simply does not fit a normal distribution, a log transformation is a very valuable tool. Log transformations may help decrease skewness when you have skewed data and can also help minimize data variability.

Standardization

The formula for standardization is:

  • Z = x-μ/σ

Min-Max Scaling

The formula for min-max scaling is:

  • Z = x-min(x)/max(x)-min(x)

Mean Normalization

The formula for mean normalization is:

  • Z = x-mean(x)/max(x)-min(x)

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