Section: Random Number Generation
y = randchi(n)
where n
is an array containing the degrees of freedom for
each generated random variable.
--> f = zeros(7,100); --> x = (1:100)/10; --> for n=1:7;t=x.^(n/2-1).*exp(-x/2);f(n,:)=10*t/sum(t);end --> plot(x,f');The PDF is below:
Here is an example of using randchi
and randn
to compute
some chi-square random variables with four degrees of freedom.
--> randchi(4*ones(1,6)) ans = 2.6122 6.2362 0.8717 1.4935 6.0370 5.2771 --> sum(randn(4,6).^2) ans = 0.0399 4.6296 0.8697 0.5796 1.5490 5.8538