Performance of model with and without cross validation

LeMarc

Hello,

below are two models of random forest (RF). In the first one I used cross validation (CV) to validate my model. In the other one RF is used without any validation method directly on the training data. In both cases the same training data set, as well as the same real data set to apply the model is used. However the performance of both differs (slightly).

My question is: Shouldnt performance be the same?

If I use some other algorithm e.g. DT,NB, performance of both models (with and without CV) are the same.

MartinLiebig

Hi,

did you fix random seeds for both of them to make them the same? I guess this is just the flucation you get from different seeds.

Best,

Martin

MartinLiebig

Hi,

did you fix random seeds for both of them to make them the same? I guess this is just the flucation you get from different seeds.

Best,

Martin

LeMarc

Thanks @mschmitz it works.