On 0, Uwe Ligges <[EMAIL PROTECTED]> wrote: > G�ran Brostr�m wrote: > >I recently ran into the following: > > > > > >>x <- c(1,2,4,3) > >>lm(x ~ 1:length(x)) > > > >Error in model.frame(formula, rownames, variables, varnames, extras, > >extranames, : variable lengths differ > > > >but > > > > > >>lm(x ~ c(1:length(x))) > > > > > >Call: > >lm(formula = x ~ c(1:length(x))) > > > >Coefficients: > > (Intercept) c(1:length(x)) > > 0.5 0.8 > > > >and > > > > > >>identical(1:4, c(1:4)) > > > >[1] TRUE > > > >Should I report this as a bug? > > NO!!! > The ":" operator is used to model interactions in lm() and friends!
I forgot that! Thanks to all who remembered. G�ran ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
