N=200

% generate random features for class 1
x1=5+8*randn(N,1);
y1=13+1*randn(N,1);

% generate random features for class 2
x2=18+2.2*randn(N,1);
y2=9+3.5*randn(N,1);

figure(2)
plot(x1,y1,'+',x2,y2,'or')
xlabel('length (m)')
ylabel('width (m)')
title('2-class, 2 feature problem--not easily separable')
legend('class 1', 'class 2')
grid on