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how rapidminer regard categorical variable in logistic regression?
I ran logistic regression. the dependent variable is 'IDKC WS_10', which has two categories, W and M. I used six independent variables, and one of them is categorical variables: 'IDKC WS_3' (W /M).
1 ) I wonder how the rapidminer calculate confidence with the combination of categorical and continuous variable. I didn't set any reference group (how to do this actually?).
2) I wonder how the rapidminer convert or regard the categorical variable when it shows the logistic equation. How can I write the equation with using the coefficient for the categorical variable?