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I have been chasing this up for while as well. I am still not clear on your answer.
How do you derive Weight from Chi-Squared for two variables X and Y? I imagine we construct a contingency table of "r" rows (corresponding to all classes of variable X) and "c" columns (corresponding to all classes of variable Y). I have no issue calculating Chi-Squared statistic of X and Y independence. How do you get the weight for X and Y from this?
Jacob
I would be interested in this, too...
any way to look into the source code?
The core of RapidMiner Studio is open source and available at github: https://github.com/rapidminer/rapidminer-studio
If you want to get a better understanding of the 'Weight by Chi Squared Statistic' operator, you can find the implementation details here.
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