(a==1)*1 or ifelse(a == 1, 1, 0) ------------------------------------------------------------------- Jacques VESLOT
CNRS UMR 8090 I.B.L (2ème étage) 1 rue du Professeur Calmette B.P. 245 59019 Lille Cedex Tel : 33 (0)3.20.87.10.44 Fax : 33 (0)3.20.87.10.31 http://www-good.ibl.fr ------------------------------------------------------------------- z s a écrit : > 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. ______________________________________________ [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.
