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
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