| coef.WCE | R Documentation |
This function extracts the estimated coefficients from a WCE object.
## S3 method for class 'WCE' coef(object, ...)
object |
A WCE object. |
... |
Optional. Additional arguments to be passed to |
The function returns a list with one element if the WCE object was fitted without covariates and two if the WCE object was fitted with covariates. The first element is a matrix of estimated coefficients for the artificial D variables (see Sylvestre and Abrahamowicz, 2009). Each row of the matrix corresponds to a model with the number of knots specified in WCE. The second element of the list is a matrix of estimated covariate coefficients. Similarly, each row of the matrix corresponds to a model with the number of knots specified in WCE.
WCEest |
Matrix of estimated coefficients of the artificial D variables. |
covariates |
Matrix of estimated coefficients of the covariates (optional). |
Marie-Pierre Sylvestre
marie-pierre.sylvestre@umontreal.ca
Sylvestre, M. P., & Abrahamowicz, M. (2009). Flexible modeling of the cumulative effects of time-dependent exposures on the hazard. Statistics in medicine, 28(27), 3437-3453.
checkWCE(drugdata, id = "Id", event = "Event", start = "Start",
stop = "Stop", expos = "dose")
wce <- WCE(drugdata, "Cox", 1, 90, constrained = "R", id = "Id",
event = "Event", start = "Start", stop = "Stop", expos = "dose",
covariates = c("age", "sex"))
coef(wce)