model.matrix.stepmented {segmented} | R Documentation |
This function builds the model matrix for stepmented
fits.
## S3 method for class 'stepmented'
model.matrix(object, type=c("cdf","abs","none"), k=NULL, ...)
object |
A stepmented fit |
k |
The (negative) exponent of the sample size to approximate the absolute value; see |
type |
The approximation for the indicator function/absolute value. If |
... |
additional arguments |
If type="none"
, model.matrix.stepmented
return the design matrix including the indicator function values and ignoring the psi terms.
The design matrix for a stepmented regression model with the specified formula and data
Vito Muggeo
See Also as model.matrix
, vcov.stepmented