function B=MarkovMatrix(n)
% function B=MarkovMatrix(n); will return an n x n matrix with probability
% vectors as columns.

B=randn(n,n);
B=exp(B);               %Exponentiate to get all positive entries.
Cols=sum(B);

B=B./repmat(Cols,n,1);  %Divide so that the col sums to one