Hi Folks, No doubt a question with a well-known answer, but I'm unfortunately not managing to find it readily ... !
I have a quantitative variable Y and a 4-level ordered factor A (with very unequal numbers at the different levels, by the way). The command lm(Y ~ A) returns (amongst other stuff) an intercept, and coefficients A.L, A.Q and A.C for the Linear, Quadratic and Cubic effects. I'm trying to verify how R computes A.L, A.Q and A.C (equivalently, and preferably, what are the definitions of these that correspond to how R computes them). I haven't touched whatever R's default settings may be for this operation. Can some kind soul enlighten me? With thanks, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <[EMAIL PROTECTED]> Fax-to-email: +44 (0)870 167 1972 Date: 22-Nov-03 Time: 08:40:10 ------------------------------ XFMail ------------------------------ ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
