%% svm1: input
%% XOR problem


clc

x1=[1,-1];
x2=[-1,1];
x3=[-1,-1];
x4=[1,1];



x=[x1;x2;x3;x4];
y=[1;1;-1;-1];

l = size(x,1);

% display data

% fprintf(1,'displaying data...\n');

figure
plot(x(find(y==1),1)',x(find(y==1),2)','bs',x(find(y==-1),1)',x(find(y==-1),2)','ko')
% axis(axis + [-0.1 +0.1 -0.1 +0.1])
axis([-2 2 -2 2])
legend('class one','class two',0);
drawnow;