On Wed, 5 Oct 2011, Petr PIKAL wrote:
Hm. I seldom use such approach. In your original request you said you want split your data to smaller data frames based on sites
Petr, I need the additional information in the database, too.
From what we know it is difficult to say if there is some common feature in site variable. If it is organised like XY-N you can simply make new variable from first two letters
Unfortunately, the site designations are not so uniform. As I went through the process of re-doing the data I discovered this lack of consistency resulting in duplicate records because one site had been designated XX-n and XXn. Had to clean those up, too.
sites <- substr(chemdata$site,1,2) then you can split your data frame according to sites chem.spl <- split(chemdata, sites) and do anything with your splitted data frames organised in list
First thing this morning I'm upgrading to 2.13.2 and hoping that this fixes an issue that just showed up yesterday afternoon: not being able to access function help pages. For example, I tried ?subset and ?split because I thought the latter is really what I want, yet R told me no help was found. Strange; it was there a week ago. 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.
