knots.WCE: Obtain the placement of the knots used for splines in WCE...

Description Usage Arguments Value Author(s) References Examples

Description

This function extracts the knots placement for the spline function used to fit the WCE models.

Usage

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## S3 method for class 'WCE'
knots(Fn, ...)

Arguments

Fn

A WCE object returned by WCE.

...

Optional. Additional arguments to be passed to knots (none currently used).

Value

Returns a list of vectors indicating the placement of the knots used in the spline function of each of the models fitted in the WCE object.

Author(s)

Marie-Pierre Sylvestre
marie-pierre.sylvestre@umontreal.ca

References

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.

Examples

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wce <- WCE(drugdata, "Cox", 1, 90, constrained = "R", id = "Id", event = "Event",
		   start = "Start", stop = "Stop", expos = "dose", 
		   covariates = c("age", "sex"))
knots(wce)


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