Plot of probability of 1-year survival event vs. variable value? Would be derived from a Cox model

I am hoping to plot the probability of a patient surviving to 1 year without progression (status==0) vs. the value of a continuous variable (radiation.dose). This would be based on a univariate cox proportional hazards model. I've Googled this and can't find anyone who has done this before. What I imagine is similar axes to this logistic regression plot: Logistic probability vs. variable

Here is some sample code for you to work with:

library("survival")
require("survival")

days <- rpois(100, 365)
status <- rbinom(100,1,0.34)

mod<-Surv(df$$days,df$$status)


cox.pred<- exp(-predict(cox.mod, type = "expected"))