In my original dataset, the response variable (RESIDUALS) can be less than zero. However, all the predictions (P_RESIDUALS in data_out) are non-negative. Where is the setting to allow negative predictions?
proc hpsplit data=data_in nodes;
class DIM1 DIM2;
model RESIDUALS = DIM1 DIM2;
grow RSS;
prune REDUCEDERROR(leaves=8);
output out=data_out;
id _Leaf_ DIM1 DIM2;
run;quit;
Try removing the Leaves= on the PRUNE setting or even test without pruning.
Just how common are your negative values? If they are uncommon I would suspect that you may need a fuller tree to get them.
Try removing the Leaves= on the PRUNE setting or even test without pruning.
Just how common are your negative values? If they are uncommon I would suspect that you may need a fuller tree to get them.
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