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Wednesday, 16 March 2011

Discretize by user specification: an example

The Discretize By User Specification operator allows numerical attributes to be placed in bins where the boundaries of the bins are defined by the user. This converts numerical attributes into nominal ones as required by some algorithms.

The following shows some example settings for the operator

The class names show the equality tests. The order of the list is important. The first entry must be the biggest, the last the smallest. Anything lower than the smallest entry is automatically less than "-Infinity". The upper case I on Infinity is important.

These example settings on a small example set are shown below.

The attribute "Copy of att1" is simply a copy of att1 before the discretization.

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