function cons_plot(r, interval, file)
	
	steps=interval(1):interval(2);
	
	figure; 
	num_fig = 3; fig = 1;

	subplot(num_fig,1,fig); fig=fig+1; hold on;
	
	plot(steps,r.x(:,steps)','b-');
	
	plot(interval,[r.goal r.goal],'r-');
	a = axis; axis([interval a(3) a(4)]);

	title('States');
	ylabel('x')
	xlabel('time')
	
	subplot(num_fig,1,fig); fig=fig+1; hold on;

	
	plot(steps,log_or_small(r.disagreement(steps)));
	title('Disagreement');
	ylabel('log(x^T Lx)')
	xlabel('time')
	a = axis; axis([interval a(3) a(4)]);	


	subplot(num_fig,1,fig); fig=fig+1; hold on;
	plot(steps,r.drift(steps));
	title('Drift');	
	ylabel('d(k)')
	xlabel('time')
	a = axis; axis([interval a(3) a(4)]);	



function r = log_or_small(k)
	for i=1:numel(k)
		r(i) = log(max(k(i),0.0000000001));
	end