[R] Is the output of survfit.coxph survival or baseline survival?

[koshihaku]

Dear all, 
I am confused with the output of survfit.coxph.
Someone said that the survival given by summary(survfit.coxph) is the
baseline survival S_0, but some said that is the survival S=S_0^exp{beta*x}.

Which one is correct?

By the way, if I use "newdata=" in the survfit, does that mean the survival
is estimated by the value of covariates in the new data frame?

Thank you very much!

Koshihaku

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