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    %% Compute Empirical Cumulative Distribution Function  
% Compute the Kaplan-Meier estimate of the cumulative distribution function
% (cdf) for simulated survival data.   

% Copyright 2015 The MathWorks, Inc.


%% 
% Generate survival data from a Weibull distribution with parameters 3 and 1. 
rng default;  % for reproducibility
failuretime = random('wbl',3,1,15,1);  

%% 
% Compute the Kaplan-Meier estimate of the cdf for survival data. 
[f,x] = ecdf(failuretime);
[f,x]  

%% 
% Plot the estimated cdf. 
figure()
plot(x,f)