ELI5: Explain Like I'm 5

Elastic net regularization

Imagine you have a big toy box with lots of different toys inside. And you have to tidy up all your toys by putting them in different chests or boxes. But you need to make sure that all the chests are not too heavy and that they can still support all the toys that go into it.

Now, let's apply this concept to statistics. Elastic net regularization is a method used to help tidy up data by putting it into different boxes, but ensuring that these boxes are not too heavy (overlapping variables) and can support all the data (variables).

To use this method, we take a dataset and split it into two parts - the training set and the validation set. The training set is used to create a model and the validation set is used to test the model.

We then use the elastic net regularization method to help us find the best set of variables that explain the data. The method assigns weights to each variable based on its significance in explaining the data. This means that some variables might carry more weight in explaining the data than others.

The method therefore helps create a more accurate predictive model while avoiding overfitting (using too many variables to explain the data) and keeping the relevant variables that explain the data well. Essentially, the elastic net regularization technique helps us to organize our data into "boxes" in a way that makes sense and avoids putting too much pressure on any one "box".