Plotting multiple graphs in one plot

Hi, I want to plot the (PR) vs. the (PR_ave) where (PR)changes daily while (PR_ave) is the aferage of the (PR), please change the code below to the desired goal, thank you

I want the code to produce a plot like this:-

PR = (Md_MSF_seclatent_steam)./(Ncqsum);  % Performance Ratio

PR_ave=sum(PR)/365;                         % Average Performance Ratio

plot(PR,PR_ave);
ylabel("PR")
xlabel("Days")
title("Performance Ratio profile")

Answer 1

[VBBV]

% PR = (Md_MSF_seclatent_steam)./(Ncqsum);  % Performance Ratio
PR = rand(365,1);

PR_ave=sum(PR)/365;                         % Average Performance Ratio

hold on
plot(PR)
plot(PR_ave*ones(1,365));
ylabel("PR")
xlabel("Days")
title("Performance Ratio profile")
legend('PR','PR-ave')