This function builds the model matrix for stepmented
fits.
# S3 method for stepmented
model.matrix(object, type=c("cdf","abs","none"), k=NULL, ...)
The design matrix for a stepmented regression model with the specified formula and data
A stepmented fit
The (negative) exponent of the sample size to approximate the absolute value; see vcov.stepmented
for details.
The approximation for the indicator function/absolute value. If "none"
, the simple matrix with the original indicator values is returned. type='abs'
is not yet allowed.
additional arguments
Vito Muggeo
If type="none"
, model.matrix.stepmented
return the design matrix including the indicator function values and ignoring the psi terms.
See Also as model.matrix
, vcov.stepmented