[R] Confidence interval of Survival Curve of Weighted Cox Regression

[Terry Therneau]

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May I know how to obtain the confidence interval of the survival curve
of
weighted Cox regression model?
I tried coxph, cph, and coxphw, but they did not work.
Any help would be much appreciated. 

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Use the latest version of the survival pacakge from CRAN, coxph now
supports weighted survival curves.

Terry Therneau