% Download the data from the class website:
load Exam2Ques2DataE  %THIS IS REVISED (SLIGHTLY NEW DATA)

% Plot the data for the classifier:

plot(X1(:,1),X1(:,2),'r*');
hold on
plot(X2(:,1),X2(:,2),'b^');
plot(X3(:,1),X3(:,2),'gs');
plot(X4(:,1),X4(:,2),'mp');

%Once you've determined your weights, put the two decision boundaries here:


hold off


% Create the domain data as a tall matrix, 400 x 2
X=[X1;X2;X3;X4];

% Create a tall matrix of target values for the classes, (+/-1, +/-1)
tt=ones(100,1);
T=[-tt tt; tt tt; tt -tt; -tt -tt];  %THIS IS REVISED

%Delete this unless you want the original data around:
clear X1 X2 X3 X4 tt