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bufospro 0 Junior Poster

Hi,
I am trying to do an exercise on weka.
I open file iris.arrf from data folder of weka and I made a clustering with
Cobweb algorithm (cluster mode useing training set and then classes to
cluster evaluation).

When I use training test I take as output a tree with 3 nodes, but in classes to cluster evaluation I take a tree with 2 nodes.

Could someone explain me what happens ?

Thanks a lot

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