"Iterating through each fold in X-Validation operator ?"

kashif_khan

Hello Friends,

I am trying to iterate through each fold separately via java code in rapidminer but don't have a clue. I can access the Validation Operator and it's sub processes (train and test) but don't have any idea how to iterate through k-fold one by one ???

I appreciate any help ...

Marco_Boeck

Hi,

you can't reasonably do it without creating your own operator which extends XValidation.
You can see the code of X-Validation by looking at com.rapidminer.operator.validation.XValidation.java. The estimatePerformance() method starts the cross validation and calls protected methods from there on. If you want to hook into them, you'd have to create your own x-val operator which can then override the protected methods.

Regards,
Marco