How to create a counter to store multiple solutions

Hi there,

Im trying to create a counter for my QW results. At the moment it's only storing the last 2 values. I would like to create an array with 208 rows and 1 column to store all the results. Could someone please assist.

Answer 1

[Karim]

Since you have a double loop, the easiest method will be to add a variable e.g. counter. Initialize it to zero, and then add 1 to it just before you want to save some data. You can then use that counter as an index.

% initalize output variables (104 rows 2 column)
Mij_out = zeros( 104, 2);
QW_out = zeros( 104, 2);

A = [0 0.25];
B = [0 3.25];
P = -94.2194;

xi = 0.5:0.5:4;
yi = -1:0.5:5;

% initialize the counter
counter  = 0;

for i = 1:8
    for j = 1:13
        
        Mij = [xi(i) yi(j)];
        
        UMA = A-Mij;
        UMB = B-Mij;
        
        Mag_UMA = sqrt(sum(UMA.^2,2));
        Mag_UMB = sqrt(sum(UMB.^2,2));
        
        FAM = UMA ./ Mag_UMA;
        FBM = UMB ./ Mag_UMB;
        
        G = [FAM' FBM'];
        k = [0;-P];
        
        if rank(G) == rank([G k])
            % solve for M2
            QW = G\k;
            
        end
                
        % add to the counter
        counter = counter + 1;
        % save the data
        Mij_out( counter,:) = Mij;
        QW_out( counter,:) = abs(QW);
        
    end
end

Mij_out

Mij_out = 104×2

0.5000 -1.0000 0.5000 -0.5000 0.5000 0 0.5000 0.5000 0.5000 1.0000 0.5000 1.5000 0.5000 2.0000 0.5000 2.5000 0.5000 3.0000 0.5000 3.5000

QW_out

QW_out = 104×2

42.2822 134.3980 28.3094 118.8165 17.5567 103.2719 17.5567 87.7837 28.3094 72.3883 42.2822 57.1606 57.1606 42.2822 72.3883 28.3094 87.7837 17.5567 103.2719 17.5567

[SGer]

Hi Karim,

I tried this but it still wouldn't save the data. T

[Karim]

I updated the answer, and included the code from your picture. The code runs without error

[SGer]

Thank you!!