The cutpoint is on the predictor, so the interpretation is the same as it is for any other rpart model. The subjects with predictor < cutpoint form one group and those > cutpoint the other. The cutpoint is chosen to give the greatest difference in "average y" between the groups. For poisson "averge y" is an event rate. On 10/08/2015 05:00 AM, r-help-request at r-project.org wrote:> I am trying to derive cutpoint/threshold with a poisson distributed > dependent variable. I know how to interpret cutpoint with binary dependent > variable based on direction. Can some on help me to intrepret cutpoint for > poisson case with one independent variable with the derived threshold.