clear all;
close all;

x1=[1 2 3 8 9 10];
x2=[4 5 12 6 9 12];
yy=[1.1 1.2 0.5 1.3 1.4 0.8];

xx=[x1 x2 yy];

ind1=find(xx(:,3)==1);
ind2=find(xx(:,3)==0);

figure;plot3(xx(:,1),xx(:,2),xx(:,3),*);grid on;


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

m1=mean(xx(:,2));
indL=find(xx(:,2)<m1);
indR=find(xx(:,2)>=m1);

xxL=xx(indL,:);
xxR=xx(indR,:);

mean(xxL(:,3))


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ind=2;
m2=mean(xxR(:,ind));
indRL=find(xxR(:,ind)<m2);
indRR=find(xxR(:,ind)>=m2);

xxRL=xxR(indRL,:);
xxRR=xxR(indRR,:);

mean(xxRL(:,3))
mean(xxRR(:,3))