https://imgur.com/a/WrVfuHI (caption of my problem)
As you can see on the picture, I have the following error : there are aliased coefficients in the model. I have trying to create dummy variable to represent de Variable " Traitement " with " IF(Traitement== "Acupuncture",1,0) where " acupuncture is normally a nominal variable.
But As I said I get the error " here are aliased coefficients in the model "
Thank you in advance for your help