I tried the Optimize Parameter (Grid) Operator in my Process, to find optimal Parameters for a decision tree. The Operator workd fine. My Problem now is, when i use the Parameters in a seperate decision Tree the accuraccy is different from the Optimize Operator.
The Optimize Parameter Operator detects that with the criterion gini_index and depth of 3 and in the cross validation with the stratified method and 5 folds the accuracy of 80%.
If I use these Parameters to the exact same Process (without Optimize Parameter) with same data and Operators, then the accuracy drops to 60%.
Is there any solution to this problem? Or is that explainable?