%SHOW THE DECISION THAT LINEAR CLASSIFIER w MAKES ON TRAINING DATA (X,Y)

Y_hat = sign(w_learned'*X);         %classify inputs
scatter3(X(1,:),X(2,:),X(3,:), 80, Y_hat, 'filled');  %visualize the model's decisions
drawnow;
sum(Y_hat~=Y)/size(X,2)             %show error rate