dummy code

Tracywangm

Dear Data Mining and Rapid Miner Experts,
I am the first learner. Now I want to create 3 new coding variables to dummy code with 4 groups about the seasons and define 2 reference categories(spring, other countries). Could you please tell me how to do it?
Thank you!

Telcontar120

Sure, the "Nominal to Numerical" operator allows you to recode nominals as numerical, and the parameter options allow you to select either dummy coding (one-hot encoding) or effect coding (with a defined reference category that will be omitted).  See the tutorial for that operator for more information.