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%% Empirical Survivor Function with 99% Confidence Bounds % Generate survival data and plot the empirical survivor function with 99% % confidence bounds. % Copyright 2015 The MathWorks, Inc. %% % Generate lifetime data from a Weibull distribution with parameters 100 and 2. rng default % for reproducibility R = wblrnd(100,2,100,1); %% % Plot the survivor function for the data with 99% confidence bounds. ecdf(R,'function','survivor','alpha',0.01,'bounds','on') hold on %% % Fit the Weibull survivor function. x = 1:1:250; wblsurv = 1-cdf('weibull',x,100,2); plot(x,wblsurv,'g-','LineWidth',2) legend('Empirical','LCB','UCB','Population',... 'Location','NE') %% % The survivor function based on the actual distribution is within the confidence % bounds.