Warning in plotsurv

[NightlordTW]

 > # Try:
   > plotsurv(x = output_cv2, ylab = "RMTL ratio of drug1 vs drug0 in each subgroup")
   Error in plotsurv(x = output_cv2, ylab = "RMTL ratio of drug1 vs drug0 in each subgroup") : 
     could not find function "plotsurv"
   Execution halted

Possibly, the function plotsurv is not exported in the NAMESPACE, this would need to be fixed with the roxxygen documentation