to evaluate my modell i am using the Curve fitting Tool. I loaded my data. And i want to calculate the R-Squared .So i set a Polynom first degree (y = x) as a reference.
The problem is, for every Robust mode ( Off , bisquare , LAR) i get a different R-squared value even though data and the reference ( line y= x) didn#t change.
Do you have an explanation ?