On Wed, 5 Oct 2011, Petr PIKAL wrote:
But you do not loose them, your data frame is cut according to sites variable and put into a list
I know this, Petr. But adding them to the database table ensures that the information is there, too. This brings up another question, but I should put that on a different thread. It's about process and work flow; that is, when can I use multiple factors in the original data frame and when I need to split and subset the data frame. I think it depends on how many factors can be specified by a particular model or graph. Regardless, I'll hold off on this as I work through these initial exploratory steps. Thanks, Rich ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
