How to plot loop items on legend

Hi,

I've got a loop that uses values in a list (fRat) in each iteration. The output of the code is as expected, but I want to make sure the legend shows me which curve corresponed to which iteration value in the list. So far it's only giving me the last list item value i.e., 0.3.

I've attached the code.

Also, if i move the %plotting block from where it is now, it'll again only output one curve - the last one.

I look forward to your advice and/or feedback.

Thanks.

%range
x = 50:1000;
TL = zeros(length(x), 1); % memory pre-allocation

for fRat = [0.1, 0.15, 0.3] %list
    
    for j = 1:length(x)
 
        %code
        %TL - desired output function
       
    end
    
    
    %plotting
        y = real(TL);
        semilogx(x, y)
        hold on
        legend(strcat('p=', num2str(fRat))) 
        xlabel("Frequency (Hz)")
        ylabel("Transmission loss (dB)")
       
 
end

Answer 1

[Voss]

%range
x = 50:1000;
TL = zeros(length(x), 1); % memory pre-allocation

fRat_all = [0.1, 0.15, 0.3];

% pre-allocate line handles:
h_line = zeros(1,numel(fRat_all));

for ii = 1:numel(fRat_all) %list
    
    fRat = fRat_all(ii);
    
    for j = 1:length(x)
        
        %code
        %TL - desired output function
        
        TL(j) = ii+0.25; % some different TL values, so the lines are different
        
    end
    
    %plotting
    y = real(TL);
    % store this line as h_line(ii):
    h_line(ii) = semilogx(x, y);
    hold on
    
end

legend(h_line,sprintfc('p=%.2f',fRat_all)); % use all lines and all fRat values in legend
xlabel("Frequency (Hz)")
ylabel("Transmission loss (dB)")

[Joshua Tshuma]

Awesome. Works perfectly. Thank you

[Voss]

You're welcome!