Re: [R] prediction error for test set-cross validation

2009-03-11 Thread Frank E Harrell Jr
Uwe Ligges wrote: Mehmet U Ayvaci wrote: Hi, I have a database of 2211 rows with 31 entries each and I manually split my data into 10 folds for cross validation. I build logistic regression model as: model <- glm(qual ~ AgGr + FaHx + PrHx + PrSr + PaLp + SvD + IndExam +

Re: [R] prediction error for test set-cross validation

2009-03-11 Thread Uwe Ligges
Mehmet U Ayvaci wrote: Hi, I have a database of 2211 rows with 31 entries each and I manually split my data into 10 folds for cross validation. I build logistic regression model as: model <- glm(qual ~ AgGr + FaHx + PrHx + PrSr + PaLp + SvD + IndExam + Rad +BrDn + BRDS

[R] prediction error for test set-cross validation

2009-03-10 Thread Mehmet U Ayvaci
Hi, I have a database of 2211 rows with 31 entries each and I manually split my data into 10 folds for cross validation. I build logistic regression model as: >model <- glm(qual ~ AgGr + FaHx + PrHx + PrSr + PaLp + SvD + IndExam + Rad +BrDn + BRDS + PrinFin+ SkRtr + NpRtr +