Togaware DATA MINING
Desktop Survival Guide
by Graham Williams
Google


Join Categorics

The Join Categorics option provides a convenient way to stratify the dataset, based on multiple categoric variables. It is a simple mechanism that creates a new variable from the combination of all of the values of the two constituent variables selected in the Rattle interface. The resulting variables are prefixed with JOIN_ and include the names of both the constituent variables.

A simple example might be to join Gender and Marital, to give a new variable, JOIN_Marital_Gender.

We might also want to join a numeric variable and a categoric variable, like the typical Age and Gender stratification. To do this we first use the Binning option within Remap to categorise the Age variable (See Section 23.3.1).



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