www.gusucode.com > stats 源码程序 matlab案例代码 > stats/PlotEmpiricalCdfAndCompareWithSamplingDistributionExample.m
%% Compare Empirical cdf with Sampling Distribution % This example shows how to plot the empirical cdf of sample data and % compare it with a plot of the cdf for the sampling distribution. In % practice, the sampling distribution would be unknown, and would be chosen % to match the empirical cdf. % Copyright 2015 The MathWorks, Inc. %% % Generate random sample data from an extreme value distribution with a % location parameter |mu = 0| and scale parameter |sigma = 3|. rng default; % For reproducibility y = evrnd(0,3,100,1); %% % Plot the empirical cdf of the sample data on the same figure as the cdf % of the sampling distribution. cdfplot(y) hold on x = -20:0.1:10; f = evcdf(x,0,3); plot(x,f,'m') legend('Empirical','Theoretical','Location','NW')