Re: [R] lm ~ v1 + log(v1) + ... improve adj Rsq ¿any sense?

2011-03-22 Thread Frank Harrell
If you care about confidence interval coverage, type I error, or predictive accuracy, trying different models in this way is not the way to go. Frank agent dunham wrote: Dear all, I want to improve my adj - R sq. I 've chequed some established models and they introduce two times the

[R] lm ~ v1 + log(v1) + ... improve adj Rsq ¿any sense?

2011-03-22 Thread agent dunham
Dear all, I want to improve my adj - R sq. I 've chequed some established models and they introduce two times the same variable, one transformed, and the other not. It also improves my adj - R sq. But, isn't this bad for the collinearity? Do I interpret coefficients as usual?

Re: [R] lm ~ v1 + log(v1) + ... improve adj Rsq ¿any sense?

2011-03-22 Thread Mike Marchywka
Date: Tue, 22 Mar 2011 09:31:01 -0700 From: crossp...@hotmail.com To: r-help@r-project.org Subject: [R] lm ~ v1 + log(v1) + ... improve adj Rsq ¿any sense? Dear all, I want to improve my adj - R sq. I 've chequed some established models