On 30-Jan-08 19:47:55, Ramon Hidalgo wrote: > Hello, > > How can I make the following expressions are equivalent > datos$Col1 and datos$var when I define var <- "Col1"? > > I am trying to get the same result with >> datos$Col1 > [1] 0 1 1 0 1 0 1 1 0 > > And >> datos$var > NULL
It will work if you use [], though I'm not sure that this is the best or orthodox way to do it: datos<-data.frame(Col1=c(0,1,1,0,1,0,1,1,0),Col2=c(1,2,2,1,2,1,2,2,1)) var<-"Col1" datos[var] ## Col1 ##1 0 ##2 1 ##3 1 ##4 0 ##5 1 ##6 0 ##7 1 ##8 1 ##9 0 Hoping this helps, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <[EMAIL PROTECTED]> Fax-to-email: +44 (0)870 094 0861 Date: 30-Jan-08 Time: 21:15:07 ------------------------------ XFMail ------------------------------ ______________________________________________ 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.
