Dear Douglas Bates, Thank you very much for your kind reply.
_________________________ Mohammad Ehsanul Karim <[EMAIL PROTECTED]> Institute of Statistical Research and Training University of Dhaka, Dhaka- 1000, Bangladesh _________________________ > Draper and Smith (1981) are using unnormalized orthogonal > polynomials whereas the R function poly(X, degree = 6) > produces normalized columns. ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
