EDU>> load mousedata
EDU>> size(mousedata)
EDU>> plot(mousedata(:,1))     
EDU>> plot(mousedata(:,2))
EDU>> plot(mousedata(:,3))
for i = 1:length(mousedata)
   d(i) = (mousedata(i,2) - mousedata(1,2))*(mousedata(i,2) - mousedata(1,2)) + (mousedata(i,3) - mousedata(1,3))*(mousedata(i,3) - mousedata(1,3));
   d(i) = sqrt(d(i));
end
EDU>> plot(d)
EDU>> plot(diff(d))
