Anyone know how to split numerical attributes to make decision tree??

Hi experts,
I would like to know how to find optimal multi splits for numerical attributes
in Decision Tree Learning.
For splitting categorical attributes, gini and gain index are used and the splits that
produce the best gain are selected.
However, in case of numerical attributes
how do you find the best splits?????
Please help me !!

I think binning/discretization techniques are used for this. There are some papers on this topic that may help you.
http://citeseer.ist.psu.edu/context/327482/216944
Regards
Sunil

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