model.matrix.gam {mgcv} | R Documentation |
Obtains the model matrix from a fitted gam
object.
## S3 method for class 'gam' model.matrix(object, ...)
object |
fitted model object of class |
... |
other arguments, passed to |
Calls predict.gam
with no newdata
argument and
type="lpmatrix"
in order to obtain the model matrix of object
.
A model matrix.
Simon N. Wood simon.wood@r-project.org
Wood S.N. (2006b) Generalized Additive Models: An Introduction with R. Chapman and Hall/CRC Press.
require(mgcv) n <- 15 x <- runif(n) y <- sin(x*2*pi) + rnorm(n)*.2 mod <- gam(y~s(x,bs="cc",k=6),knots=list(x=seq(0,1,length=6))) model.matrix(mod)