How to define degree=1 in mgcv
On Monday 25 January 2010 02:40, hellen lee wrote:
Hi, all I have a question on mgcv and ns. Now I want to compare the results from glm, gam and ns. Take a simple model y~x for example. glm1 = glm(y~x, data=data1) gam1 = gam(y~s(x), data=data1) ns1 = glm(y~ns(x),data=data1) In order to confirm the result from glm1 is consistent to those from gam1 and ns1, I want to define degree=1 in mgcv and ns. I am wondering if there is somebody can give me some suggestions? I appreciate.
gam(y~x,data=data1) or gam(y~s(x,sp=1e6),data=data1) you might need to increase the value supplied in `sp' in order to get the EDF for the smooth term close enough to 1 for your liking. best, Simon
> Simon Wood, Mathematical Sciences, University of Bath, Bath, BA2 7AY UK > +44 1225 386603 www.maths.bath.ac.uk/~sw283