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Permutation Validity

Hi All -

Is there anyway in RM to run permutation of the label value amongst the training records? I am looking at this method (performed many times) as a form of model validation and to generate a p-value. Any RM or general thoughts on this practice?

Thanks!
Brian

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land

Hi Brian,
am I right if I assume, that you want to redistribute the label's values among the examples randomly?
As far as I recall that is not possible in RapidMiner, but you might change the label values randomly instead of redistributing them. This might be achieved by the Add Noise operator.

Greetings,
Sebastian

B_Miner

Hey Sebastian-

Yes, I am looking for a way to randomly assign labels to training cases (maintaining the number of each label of course)..

land

Hi,
I think we don't have such a method currently. Uhm. I think you will have to use the Scripting operator or write an entire Extension to add this functionality. There's a white paper available in our shop, that describes in detail how to the Scripting operator works and how Extensions can be created.

Greetings,
Sebastian