chi-squared statistics returned by RapidMiner

[CW]

Hello,

I tried to use Rapid Miner to compute Chi-squared weights of a set of attributes.

Chi-squared weights are locally defined, i.e. computed with respect to a given class, and the local weights of an attribute are sometimes combined to give a single global weight of the attribute (e.g. by summing up all of its local weights, and taking its max local weight).

My question is, how is the single chi-squared weight returned by RapidMiner computed?

Thank you very much.

Best Regards
CW

[Ingo Mierswa]

Hi,

all class based weights are summed up.

Cheers,
Ingo