clc;clear all;close all;
 
%%  STEP1 Load dataset
load DataSet
 
%% STEP2 Raw Data Visualization
 
plot(Data(:,1), Data(:,2), 's')
 
%% STEP3 Reference Data Preparation
ii=1; JJ=1;
for k=1:length(Data)
    if Data(k,3) ==1
        dog(i,:)=Data(k,:)
        ii=ii+1;
    else
        cat(jj,:)=Data(k,:)
        jj=jj+1;
    end
end
 
%STEP 4 Visualization
	plot(dog(:,1),dog(:,2),'r*')
	hold on;
	plot(cat(:,1), cat(:,2), 'o');
 
	% Text Labeling
	d1bar=sum(dog(:,1))/length(dog);
	d2bar=sum(dog(:,2))/length(dog);
	c1bar=sum(cat(:,1))/length(cat);
	c2bar=sum(cat(:,2))/length(cat);
	text(d1bar,d2bar,'Dog','FontSize',20)
	text(c1bar,c2bar,'Cat','FontSize',20)
	xlabel('X1','FontSize',20)
	ylabel('X2','FontSize',20)
	title('K-Nearest Neighbor','FontSize',15)

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