I am new to ridge regression. When I applied linear ridge regression, I got the following results:
>myridge = lm.ridge(y ~ ma + sa + lka + cb + ltb , temp, lamda = seq(0,0.1,0.001))
> select(myridge)
modified HKB estimator is 0.5010689
modified L-W estimator is 0.3718668
smallest value of GCV at 0
Questions:
- Is it OK to get zero for
GCV
? - What exactly does it mean?
- Is there a problem with my model?
- How can I find the $R^2$ value of
myridge
?