[R] cross-validation

[Trevor Wiens]

On Sun, 13 Mar 2005 15:28:54 -0700
Trevor Wiens <twiens at interbaun.com> wrote:

> I've been looking at the stats and Design libraries and it is unclear to me the best way to approach doing cross-validation. I'm interested in using temporal (I have five years of data), spatial (I've divided my data set up into 5 blocks that make sense and have a block variable attached to my data) and I was also thinking of doing a random cross-validation to look at general model stability. For the third option I think either cross-validation or bootstrapping would be appropriate
> 
> If someone can type out a really simple code example ( or point me to one), that would be very helpful. 
> 
I realized I should have mentioned this is for logistic regression using either glm or the Design lrm models.

Thanks

T
-- 
Trevor Wiens 
twiens at interbaun.com

The significant problems that we face cannot be solved at the same 
level of thinking we were at when we created them. 
(Albert Einstein)