Amit Shekhar

Regularization In Machine Learning

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  • Amit Shekhar
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    Amit Shekhar
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Regularization In Machine Learning

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In this blog, we will learn about the Regularization In Machine Learning.

Regularization is a technique which is used to solve the overfitting problem of the machine learning models.

Solving overfitting problem with regularization

What is overfitting?

Overfitting is a phenomenon which occurs when a model learns the detail and noise in the training data to an extent that it negatively impacts the performance of the model on new data.

So the overfitting is a major problem as it negatively impacts the performance.

Regularization technique to the rescue.

Generally, a good model does not give more weight to a particular feature. The weights are evenly distributed. This can be achieved by doing regularization.

There are two types of regularization as follows:

  • L1 Regularization or Lasso Regularization
  • L2 Regularization or Ridge Regularization

L1 Regularization or Lasso Regularization

L1 Regularization or Lasso Regularization adds a penalty to the error function. The penalty is the sum of the absolute values of weights.

l1 regularization

p is the tuning parameter which decides how much we want to penalize the model.

L2 Regularization or Ridge Regularization

L2 Regularization or Ridge Regularization also adds a penalty to the error function. But the penalty here is the sum of the squared values of weights.

l2 regularization

Similar to L1, in L2 also, p is the tuning parameter which decides how much we want to penalize the model.

This is Regularization.

That's it for now.

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Amit Shekhar

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