Hello, I am a novice in an introductory engineering problem solving course using matlab, and i'm having a bit of a problem. I have attached a screenshot. I know this is supposed to be pretty basic stuff, But I am hung up on it. Now, what I have so far: t=(0:0.01:10); vs=3*exp(-t/3).*(sin(pi*t)); for k=1:1:length(t); if vs(k) > 0; vs(k)=vL; else vs(k)<= 0; vL=0; end end disp(vL) plot(t,vL) xlabel('Seconds') ylabel('Voltage') title('Problem 2(Part A)') Obviously I am doing something very wrong, as when it plots, I get nothing, the graph appears blank, or is a straight horizontal line at (0,0) or something. I am having trouble narrowing it down, I think the problem lies within the % for k=1:1:length(t), and the %else, or maybe I am simply doing everything wrong to begin with. If anyone could shed a little light, or give a nudge in the correct direction, I would be greatly appreciative. I have also attached for what the graph is supposed to look like.