> I've a file with several data six variables, three quantitative and > three qualitative, I would like to select a group of data from the > file to analyze then, i.e: > my file is like that (but with 6 variables): > > Var1 Var2 > 2 1 > 5 1 > 8 1 > 7 2 > 3 2 > 8 2 > > I want to use only the data where var2 is "1" > 2 1 > 5 1 > 8 1 > > Exist a way in R to create a new dataframe with a selection of data > from other dataframe?
#Your data frame df1 <- data.frame(Var1 = c(2,5,8,7,3,8), Var2=rep(1:2, each=3)) #The desired frame df2 <- df1[df1$Var2==1,] #clearer syntax using the subset function df3 <- subset(df1, Var2==1) identical(df2, df3) #TRUE Please read section 2.7 of the 'Introduction to R' manual http://cran.r-project.org/doc/manuals/R-intro.pdf Regards, Richie. Mathematical Sciences Unit HSL ------------------------------------------------------------------------ ATTENTION: This message contains privileged and confidential inform...{{dropped:20}} ______________________________________________ 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.
