what is the hazard function what is the formula for survival function in cox how to do survival function what is the base-hazard function what is the function for survival how to get basehaz survival function what function is used to approximate survival what is hazard function in cox model what is the function of hazard function what is the function of survival in cox model why is it called unsafe function what is the purpose of a survival function what is hazard function what is hazard and caculate survival what is the basehaz function in the survival function what is the function for caculating survival? which function is the basis of the survival function basehaz survival function formula which cox model would use the bash hazard function how to hazard survival function