[R] User defined function within a formula

Hello, I have a question about the formula and the user defined function: I can do following: ###Case 1: > clotting <- data.frame( + u = c(5,10,15,20,30,40,60,80,100), + lot1 = c(118,58,42,35,27,25,21,19,18), + lot2 = c(69,35,26,21,18,16,13,12,12)) > g1=glm(lot1 ~ log(u) + poly(u,1), d

Re: [R] User defined function within a formula

alls to be used for > prediction: >> attr(g2$terms, "variables") >list(lot1, log(u), xpoly(u, 1)) > > attr(g2$terms, "predvars") > list(lot1, log(u), xpoly(u, 1, coefs = list(alpha = 40, norm2 = c(1, > 9, 8850 > > > >

Re: [R] User defined function within a formula

like makepredictcall.scale() and scale() for an >> example: >> scale has optional arguments 'center' and 'scale' that it returns as >> attributes >> and makepredictcall.scale adds those to the call to scale that it is >> given. >> Thus when you pre