lm() notation question
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 <carl at 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
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