Re: [R] validate() in Design library

2009-07-10 Thread Frank E Harrell Jr
array chip wrote: Hi, another question about validate() in Design library. The arugment "B" of this function is number of repetition for method="bootstrap", which is easy to understand; but for method="crossvalidation", B is the number of groups of omitted observations. This is confusing, I don

[R] validate() in Design library

2009-07-09 Thread array chip
Hi, another question about validate() in Design library. The arugment "B" of this function is number of repetition for method="bootstrap", which is easy to understand; but for method="crossvalidation", B is the number of groups of omitted observations. This is confusing, I don't understand what