On Mon, 29 Nov 2004 15:47:58 +0100, Eric Lecoutre <[EMAIL PROTECTED]> wrote :
> >Hi, > >If I define the following list: > > > (l<-list("text-align"="right")) >$"text-align" >[1] "right" > >I know that I can't use l$text-align, as the parser will find a '-' operation. >If I want (need) to use special names, as "text-align", I have to enclose >it between "". So I can use: > >l$"text-align" or l[["text-align"]] > >If now I have the text "text-align" defined in a variable: >p<-"text-align" > >I can use: > > l[[p]] >[1] "right" > >But I can't use l$p > >where as it is said in the help page that 'x$name' is equivalent to >'x[["name"]]'. > >Anyway I will use "[[" but I dont clearly understand this behavior. I think you do understand it. From the line above, l$p would be equivalent to l[["p"]], which is clearly different from l[[p]]. But since l$"text-align" is harder to construct than l[["text-align"]] when "text-align" is stored in p, why bother? Duncan Murdoch ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel