How to force the last observation of a variable

desireatem — Mon, 15 Jul 2013 14:29:48 GMT

Hello, in the following data generation; I want to change the last observation for variable 'censored' to '0' when ever it is '1'. That is the 100th observation should have censored=0 , even if it is supposed to e 1

data test;

seed=-1;

alpha1 = 2.50;

beta1 = 9.50;

do i = 1 to 100;

lambdaT = 0.025; *baseline hazard;

lambdaC= .03; *light=0.15; *heavy=0.03;

er=0+sqrt(0.0001)*rannor(1);

t = rand("WEIBULL", 0.75, lambdaT); * time of event;

c = rand("WEIBULL", 1.25, lambdaC) ;* time of censoring;

time = min(t, c); * which came first?;

censored = (c lt t);

obs=(t lt c); * creating observation variable from censored when

y= alpha1 + beta1*t + er;

output;

end;

run;

Re: How to force the last observation of a variable

Linlin — Mon, 15 Jul 2013 14:39:37 GMT

data test;

seed=-1;

alpha1 = 2.50;

beta1 = 9.50;

do i = 1 to 100;

lambdaT = 0.025; *baseline hazard;

lambdaC= .03; *light=0.15; *heavy=0.03;

er=0+sqrt(0.0001)*rannor(1);

t = rand("WEIBULL", 0.75, lambdaT); * time of event;

c = rand("WEIBULL", 1.25, lambdaC) ;* time of censoring;