function [atts, cls] = genData()
    mu11 = [0 0];
    sigma11 = [4 1.7; 1.7 1];
    class11 = mvnrnd(mu11,sigma11,100);

    mu2 = [0 3];
    sigma2 = [0.25 0; 0 0.25];
    class2 = mvnrnd(mu2,sigma2,100);

    mu12 = [4 3];
    sigma12 = [4 -1.7; -1.7 1];
    class12 = mvnrnd(mu12,sigma12,100);

    atts = [class11; class2; class12];
    cls = ones(300, 1);
    cls(101:200) = 2;
end
