predictor screening

Question

Hi,

After running predictor screening the out put has a column named contribution , portion and rank . Is there any unit for contribution ? Is this % is so why the some of all the contributions doest end up to 100?

Mark_Bailey · Answer

The Predictor Screening platform uses bootstrap forests for models. The contribution of each predictor is determined by this model. The description in JMP Help for bootstrap forests says:

Column Contributions
Displays a report that shows each input column’s contribution to the fit. The report also shows:
– The total number of splits defined by a column.
– The total G2 (for a categorical response) or SS, sum of squares (for a continuous response), attributed to the column.
– A bar chart of G2 or SS.
– The proportion of G2 or SS attributed to the column.