Sorry. Since . is commonly used but a matrix LHS less so I assumed you were asking about the matrix part. Dot means everything not on the LHS of the formula.
On Sun, Nov 29, 2009 at 12:18 PM, Carl Witthoft <c...@witthoft.com> wrote: > As others helpfully pointed out, the meaning of "." in a formula is > provided in the Details section of ?formula. (But NOT in ?lm) > > Ista Zahn wrote: > >> The help page for lm says: >> >> "If response is a matrix a linear model is fitted separately by >> least-squares to each column of the matrix." >> >> -Ista >> >> >> On Sun, Nov 29, 2009 at 11:46 AM, Carl Witthoft <c...@witthoft.com> >> wrote: >> >>> Hi, >>> A recent thread provided a (working) construct for lm: >>> >>> lm(as.matrix(freeny[ix]) ~., freeny[-ix]) >>> >>> >>> Can someone explain what is meant by the formula in that expression, >>> that is, what does "mymatrix~." do? I couldn't find any such example >>> in >>> the lm() or formula() help pages. >>> >>> thanks >>> Carl >>> >>> ______________________________________________ >>> 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. >>> >>> >> >> >> > ______________________________________________ > 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. > [[alternative HTML version deleted]]
______________________________________________ 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.
