Storing output into a matrix for plotting

Hello, My graph is showing up but its only plotting the last value. I understand that the vals variable is only storing the last output and that is why but how do I get it to store the value into a matrix after each run through the loop without overwriting. I need the output to be a graph of rho vs average revenue.

N = 5000;
Rmax = 50;
total_revenues = zeros(length(N),1);
charge_eff = 0.8;
discharge_eff = 0.8;
vals = [];
 
for rho = (0.1:0.1:3)
    
for n = 1:N
   
   R = zeros(24,1);
   x = zeros(24,1);
   P_d = zeros(24,1); P_d(1) = 50;
   P_s = zeros(25,1);
   W   = zeros(25,1);
   revenues = zeros(24,1);
   
   for t = 1:24
       ... (code to get answer)
   end
   total_revenues(n) = sum(revenues);
end
 
rho
avgrev = mean(total_revenues)
vals = [rho avgrev];
 
end
plot (vals)

Answer 1

[KSSV]

I expect rho is bein gused in the lines which are not shown...so repalce rho inside the loop with rho(i).

N = 5000;
Rmax = 50;
total_revenues = zeros(length(N),1);
charge_eff = 0.8;
discharge_eff = 0.8;
vals = zeros([],1);
 
rho = (0.1:0.1:3) ; 
 for i = 1:length(rho)
    
for n = 1:N
   
   R = zeros(24,1);
   x = zeros(24,1);
   P_d = zeros(24,1); P_d(1) = 50;
   P_s = zeros(25,1);
   W   = zeros(25,1);
   revenues = zeros(24,1);
   
   for t = 1:24
       ... (code to get answer)
   end
   total_revenues(n) = sum(revenues);
end
 
rho(i)
avgrev = mean(total_revenues)
vals(i) = avgrev;
 
end
plot (rho,vals)

[Dylan Springer]

Thank you so much! this fixed it!