Parameter Description: Pi (1) for Survival Data
pi1
A numeric value or vector that represents the assumed event rate in the treatment group, default is seq(0.2, 0.5, 0.1) (power calculations and simulations) or seq(0.4, 0.6, 0.1) (sample size calculations).
seq(0.2, 0.5, 0.1)
seq(0.4, 0.6, 0.1)