Dear Harold, thanks for your answer. The problem is that the levels of the factor are shown not only in the summary, but also when I make an interaction plot.
Is it possible to create a new subset without the reference to the levels that I will not use? Thanks again. Antonio Quoting "Doran, Harold" <[EMAIL PROTECTED]>: > Antonio: > > If the variable you are subsetting is a factor with multiple levels (and > it appears you have 15), then the levels of the factor remain and will > show up in summary, but your data set will only include the rows of data > that you want. I am pretty sure subset has worked properly in your case. > > Try > > > data[1:20,] > > And just look at your data to see. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Antonio Olinto > Sent: Monday, December 06, 2004 7:45 AM > To: R-help > Subject: [R] using subset > > Hi, > > I have doubts in using subset command. I have a list of, lets say, 15 > species and I want to make a subset with only 2 of them. I'm the command > data2 <- subset(data1, species=="sp1"|species=="sp2") > > Nevertheless, when I ask for the summary (summary(data2)) the others > species names still apearing. Also I tried data2<-data1(data1$species > %in% c("sp1","sp2")),] > > But I got the same result. How can I get a "clean" subset? > > Thanks for any help. Best regards. > > Antonio Olinto > > > > ------------------------------------------------- > WebMail Bignet - O seu provedor do litoral www.bignet.com.br > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > > ------------------------------------------------- WebMail Bignet - O seu provedor do litoral www.bignet.com.br ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html