How to multiply each value of a matrix by a number

Hello, Right now I am getting a matrix at the end but all the values in each row are the same. Im not sure why this is happening. My results matrix is right but the unhedged and hedged are doing this error.

k_g = [0.66, 0.65, 0.64, 0.63, 0.62, 0.61, 0.60, 0.59, 0.55];
c_g = [0.085855 0.032191 0.020795 0.017001 0.013711 0.010851 0.008388 0.006291 0.001401];
 
k_b = [1.30, 1.25, 1.20, 1.15, 1.10, 1.05, 1.00, 0.95, 0.90];
c_b = [0.137213 0.082645 0.045060 0.028338 0.016146 0.007860 0.003277 0.001134 0.000245];
 
results_G = zeros(length(k_g), length(c_g));
results_B = zeros(length(k_b), length(c_b));
unhedged_G = zeros(length(k_g), length(c_g));
unhedged_B = zeros(length(k_b), length(c_b));
 
Eg = 643000000;
Eb = 272000000;
corr = 0.675;
n = 100000;
Rg = normrnd(0,9,[n,1]);
Rb = normrnd(0,11,[n,1]);
 
for j = 1:length(c_g)
    
    for i = 1:length(k_g)
    G = 0.6531*(1+Rg(i)/100);
    netpayoff_g = (k_g(i)-G)-c_g(j);
    results_G(i,j)= netpayoff_g;
    unhedged_G(i,j)=Eg.*G;
 
    end    
    
    j=j+1;
end
 
for b = 1:length(c_b)
    
    for a = 1:length(k_b)
     B = 1.234*(1+Rb(a)/100);
     netpayoff_b = (k_b(a)-B)-c_b(b);
     results_B(a,b)= netpayoff_b;
     unhedged_B(a,b)= Eb.*B;
 
    end    
    
    b=b+1;
end
 
hedged_G = unhedged_G + (9.*results_G)
hedged_B = unhedged_B + (9.*results_B)
hedged = hedged_G + hedged_B
 
results_G
results_B
best_G = max(results_G(:))
best_B = max(results_B(:))

[jessupj]

i think new versions of matlab don't complain about dimension mismatch when you add a row vector and a column vector, returning a matrix

e.g.

>> [1 1 1] + [1 2 3]'

ans =

     2     2     2
     3     3     3
     4     4     4

try something like

unhedged_G(:) + (9*results_G(:))

to force both addends into row vectors

[Dylan Springer]

I tried that but I need the result to be a 9x9 matrix

[jessupj]

it might simply LOOK like the numbers are the same because Eg and Eb are large and the answer is displayed in scientific notation. try looking at the results after you run

format long g

Answer 1

[Sai Sri Pathuri]

You may try the following:

Create Rg and Rb as matrices with same length as results matrices

Rg = normrnd(0,9,[length(k_g), length(c_g)]);
Rb = normrnd(0,11,[length(k_b), length(c_b)]);

For the calculation of unhedged_G, define G as

G = 0.6531*(1+Rg(i,j)/100);

For the calculation of unhedged_B, define B as

B = 1.234*(1+Rb(a,b)/100);