Noobie question, regression across levels
RichardLang wrote:
I've just started using R last week and am still scratching my head. I have a data set and want to run a separate regression across each level of a factor (treating each one separately). The data right now is arranged such that the value of the factor along which I want to "split" my data is one column among many. Best way to do this? Thanks!
You can check out lmList function in the nlme package, or more crudely:
lmfun <- function(d) { lm(y~x,data=d) }
myLmList <- lapply(split(mydata,splitfactor),lmfun)
even more compactly/confusingly:
myLmList <- lapply(split(mydata,splitfactor),lm,formula=y~x)
good luck
Ben Bolker
View this message in context: http://www.nabble.com/Noobie-question%2C-regression-across-levels-tp21020222p21021025.html Sent from the R help mailing list archive at Nabble.com.