Grid optimization, results not optimal?

Fred12

hi,

 

I am doing a grid optimization with W-J48 Decision tree inside a cross validation, to find best accuracy and parameters...

however, in my Log File, I see accuracy was already about 0.857, whereas in the results performance, I get other values and parameters, and accuracy is not optimal, its only about 76% ... why is this ? Why does it not show the optimal 85.7 % accuracy that was logged?

MartinLiebig

Have you had a chance to review my answer to your last question? http://community.rapidminer.com/t5/RapidMiner-Studio/different-validation-performance-parameters-in-LOG/m-p/32092#M22911

 

i think it includes the most propable answer.

Fred12

ok thanks, I will continue in the other thread, missed that somehow..