Dear R

I am trying to understand and use the flexible parametric survival model
suggested by Royston and Parmar.
However I am stuck trying to plot the adjusted survival curves for
different covariates in the following code:

library(flexsurv)
library(graphics)
spl <- flexsurvspline(Surv(futime, fustat) ~ rx+ecog.ps+resid.ds+age, data
= ovarian, k=2, scale="odds")
spl

the code "plot(spl)" produces a red spline which is difficult for me to
interpret. I would like to plot survival based on for example age or rx.


Thanks in advance for your help in this matter
Best Regards
Maziar Mohaddes
MD, PhD student
Department of Orthopaedics
Sahlgrenska University Hospital
SE-431 80 Mölndal, Sweden

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