what about: b <- rbind(1*(a==1),1*(a==2),1*(a==3))
z s wrote: > Hi, > > I am trying to convert a variable a = sample(1:3,100,rep = T) represents > choices into a 3X100 dummy varible b with corresponding element set to 1 > otherwise 0. > eg. > > a: 1 3 2 1 2 3 1 1.... > > b: 1 0 0 1 0 0 1 1.. > 0 0 1 0 1 0 0 0... > 0 1 0 0 0 1 0 0... > > Is there something like b[a] =1 existing? I could not figure this out myself. > > > --------------------------------- > Mp3·è¿ñËÑ-иèÈȸè¸ßËÙÏ > [[alternative HTML version deleted]] > > > > ------------------------------------------------------------------------ > > ______________________________________________ > [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 > and provide commented, minimal, self-contained, reproducible code. confidentiality notice: The information contained in this e-mail is confidential and...{{dropped}} ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
