How do you incorporate a Time Lag of 2 sec into a Time series plot?

How do you incorporate a Time Lag of 2 sec into a Time series plot? Please see the two pictures. The first one seemed to be different to the one I am getting as it is shifting towards the right but the first one seems to be smaller. Do I need to have to apply that time lag effect also on the y-acis (in this case Cp time history) too?

Please see my code below:

% Time (zero lag)

t=0:dT:dT.*(length(Run3297data(:,1))-1);

% Time (with 2 sec lag)

t_2secLag=2+t

plot(t,Cp_raw_3sec(entire_time_history,195));

hold on

plot(t,C_p_movmean_3sec(entire_time_history,195).*(V_mean900sec^2./Vmovmean_3sec.^2),'LineWidth',2);

hold on

plot(t_2secLag,C_p_movmean_3sec(entire_time_history,195).*(V_mean900sec^2./Vmovmean_3sec.^2),'LineWidth',2);