How to use division in lm

Question

I would like to use lmto predict yon a/b(factor a through b) when I do lm(y~a/b)I get interactions aand bhow can I do this?

+3

statquant Feb 05 '14 at 20:25

1 answer

Sycorax · Accepted Answer · 2014-02-05T20:26:40+0000

lm(y~I(a/b))

This is described in ?formula.