|Classification tree for predicting vulnerability to famine|
Here's an interesting example from the paper Identifying
Indicators of Vulnerability to Famine and Chronic Food
Insecurity by Yohannes and Webb, showing predictors of
vulnerability to famine based on a survey of households. The
image shows all the predictors that were identified by the tree,
which appear below each circle. Each predictor is a binary
variable and you go right or left depending on the value of the
predictor. It is easiest to start reading from the top, with an
household in mind. Our goal is to generate groups of households
with similar profiles, where profiles are the combination of
answers to different survey questions. - Drag the outcome of
interest into the Values area - Find the first predictor that
best splits the profiles and drag it into the Row Label field*.
- Given the first predictor, find the next predictor to further
split the profiles, and drag into the Row Label field** . -
Given the first two splits, find the next predi