Something like that? > galton2<-galton[rep(1:nrow(galton), galton$frequency), 1:2]
Christophe ----- Original Message ----- From: "Michael Friendly" <[EMAIL PROTECTED]> To: "r-help" <[EMAIL PROTECTED]> Sent: Thursday, September 25, 2003 7:14 PM Subject: [R] ungrouping grouped data > I'm sure this is probably simple, but I can't find an answer... > I have a data frame (Galton's data on heights of parents and children), > in grouped form, > > parent child frequency > 73.5 72.2 1 > 73.5 73.2 3 > 72.5 68.2 1 > 72.5 69.2 2 > 72.5 70.2 1 > 72.5 71.2 2 > 72.5 72.2 7 > 72.5 73.2 2 > 72.5 74.2 4 > 71.5 65.2 1 > 71.5 66.2 3 > 71.5 67.2 4 > 71.5 68.2 3 > 71.5 69.2 5 > 71.5 70.2 10 > ... > > and need the ungrouped equivalent, where each input observation > appears the number of times represented by its frequency. In SAS > this would be > > data galton2; > set galton; > do i=1 to frequency; > output; > end; > > I can replicate this in R, but surely there must be an easier way. > (In APL2 it would be frequency\[1]galton) > > thanks, > -Michael > > -- > Michael Friendly Email: [EMAIL PROTECTED] > Professor, Psychology Dept. > York University Voice: 416 736-5115 x66249 Fax: 416 736-5814 > 4700 Keele Street http://www.math.yorku.ca/SCS/friendly.html > Toronto, ONT M3J 1P3 CANADA > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
