How to use optimize parameter (Grid) for Text Clustering (K-Means)?

anindyarani

i tried using optimize parameter grid module for K Means but its not working. I dont know how to use it properly. i searched online but all i can find is for clasification algorithm.

BalazsBaranyRM

Hi!

Yes. RapidMiner's Optimize Parameter operators are primarily meant for supervised learning methods (classification and regression).

Optimize Parameters expects a "performance vector". Usually this is coming from a cross-validation inside the optimization. But any operator that returns performances can be used.

Please check out the processes in the Samples repository, processes/07_Clustering. 
Processes 08 and 09 show the usage of the Cluster Distance Performance operator.

This operator will deliver the necessary metric in your Optimize Parameters.

Regards,
Balázs