On Fri, 19 Mar 2004, Giampiero Salvi wrote: > Hi all, > I created a data frame with three factors, plus the response that > looks like this: > > x1 x2 x3 y > a 1 1 0.3 > a 2 1 0.1 > b 1 1 0.4 > c 4 3 0.1 > ... > > I would like to analise the effect of two of them, keeping the third fixed > (I already know the effect of the last). The reason why I don't create several > data frames for each value of the thirs factor is simply convenience (I'd like > to be able to decide which factor I want to rule out) > > for example I'd like to write something like > > boxplot(y ~ x1 + x2, x3 == 1) > > which of course doesn't work, otherwise I wouldn't write :-) > > Is this possible and how?
?boxplot The subset parameter of boxplot might be what you are looking for. Vaclav ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
