Calculate survival probability of the exponential distribution with cured population
SP_Chen_exponential(par, t)Survival probability of the exponential distribution with cured population given parameters par at times t.
a vector with two elements, where the first element denotes the logistic of the proportion of the cured population, and the second element denotes the log of the hazard rate.
a vector with non-negative elements.
Chen, Tai-Tsang. "Predicting analysis times in randomized clinical trials with cancer immunotherapy." BMC medical research methodology 16.1 (2016): 1-10.