How do I hold the second to last image of the simulation?

hold on

axis equal
axis off

b = 0:pi/40:pi/4;
c = 0:pi/20:pi/2;

P4vct=nan(numel(b),2);

for k = 1:numel(b)
    P1=[-15,0];
    P2=[-5,0];
    plot([P1(1) P2(1)],[P1(2) P2(2)],'LineWidth',5,'Color','black');
    
    A=[0,0];
    h{1} = viscircles(A,5,'LineWidth',2,'Color','black'); 
    
    B = A+[10*cos(b(k)-pi/4),10*sin(b(k)-pi/4)];
    h{2} = viscircles(B,5,'LineWidth',2,'Color','green');
    
    C = B+[10*cos(c(k)-pi/2),10*sin(c(k)-pi/2)];
    h{3} = viscircles(C,5,'LineWidth',2,'Color','blue');
    
    P3=C+[5*cos(c(k)-(pi/2)),5*sin(c(k)-(pi/2))];
    P4=C+[15*cos(c(k)-(pi/2)),15*sin(c(k)-(pi/2))];
    h{4} = plot([P3(1) P4(1)],[P3(2) P4(2)],'LineWidth',5,'Color','black');
    
    P4vct(k,:) = P4;
    h{5} = plot(P4vct(:,1),P4vct(:,2), '--','LineWidth',3,'Color','blue');
    
    drawnow();
    pause(0.5);
    delete(vertcat(h{1:4}));
end
hold off
axis equal
axis off

[Walter Roberson]

"hold" it in what sense? You want the last two frames to be displayed on top of each other at the end, but during the main part of the loop only one frame is to be displayed at a time??

[Allison Bushman]

The last frame ends up being my original line between P1 and P2 without the circles, but I would like the last frame to be of the circles aligned.

Answer 1

[Image Analyst]

At the bottom of the loop, only call delete() if it's not the last one:

	if k < numel(b)
		delete(vertcat(h{1:4}));
	end