Dear Prof. Kooperberg,
Thanks a lot for your clarification! That is very helpful. I will check
out the polynomial
spline functions in S-Plus that you mentioned.
Best regards,
-XG Su
Xiaogang Su, Assistant Professor
Department of Statistics and Actuarial Scienc
That's correct. The option is not there.
You can force it in a starting model - but it can still be deleted,
At some stage Insightful implemented a commercial set of polynomial
spline functions in S-Plus that does have that option. They got it
as far as a beta-library [quoting from my own homepage
Dear Dr. Graves,
Thanks for your information and kindness! I really appreciate it.
According to my findings so far, POLYCLASS doesnot seem to allow for
variables being forced into the model. Even the commercialized MARS
doesnot have this function either. However, one ad hoc approach that
they sug
I have not seen a reply, so I will offer a few suggestions, even
though I've never used the 'polspline' package. I scanned several of
the help pages and looked in "~\library\polspline' where R is installed
on my hard drive and found no further documentation, and I found nothing
new f
Dear all,
I have a question on how to set up the starting model in POLYCLASS and
make sure the terms in the starting model retained in the final
POLYCLASS model.
In the function POLYMARS, this can be done using the STARTMODEL option.
See below for example, I started with model
y= b0 + b1*X1 +
