.. index:: Learning Wizard - Feature Selection Help

.. _Learning_Wizard_Feature_Selection_Help:

Feature Selection
=================

The Learning Wizard can perform feature selection in discrete node networks.

When there are many possible features available for a classification problem, we might want to select a subset of these features for the actual classification. We can learn such a subset by using mutual information.

We start with the **target variable**. Then we successively select features such that the next selcted feature has the highest sum of mutual information scores to the currently selected features.

Select target node
^^^^^^^^^^^^^^^^^^

The target node for the features.

Number of features
^^^^^^^^^^^^^^^^^^

The maximum number of nodes