Looping through mulyiple variable with names+numbers

Hi everyone,

Been trying to use a for loop for my 25+ variables, but to no avail. Please have a look at this snippet of a code:

    %%%%%%%%%%%%%%%%%%%% working code
    nb_iterations = 5;
    A1rms  = 230;                       P1rad  = 0;
    A3rms  = 0*A1rms;                   P3rad  = 0;
    A5rms  = [0:0.00775:0.031]*A1rms;   P5rad  = 0;
    A7rms  = [0:0.00695:0.0278]*A1rms;  P7rad  = pi;
    A9rms  = 0*A1rms;                   P9rad  = 0;
    
    V_As = [];     V_Ps = [];
    
    for tr = 1:nb_iterations
        A3rms_int  = rand(1)*max(A3rms);
        A5rms_int  = rand(1)*max(A5rms);
        A7rms_int  = rand(1)*max(A7rms);
        A9rms_int  = rand(1)*max(A9rms);
        V_As = [V_As; [A3rms_int, A5rms_int, A7rms_int, A9rms_int]];
     
        P3rad_int = rand(1)*P3rad;
        P5rad_int = rand(1)*P5rad;
        P7rad_int = rand(1)*P7rad;
        P9rad_int  = rand(1)*P9rad;
        
        V_Ps = [V_Ps; [P3rad_int, P5rad_int, P7rad_int, P9rad_int]];
    end
    %%%%%%%%%%%%%%%%%%%% efficient code (not working)
    
    selected_harm = 3:2:9;
    for tr = 1:nb_iterations
        for idx = length(selected_harm)    
            A(idx)rms_int  = rand(1)*max(A(idx)rms);
            V_As = [V_As; [A3rms_int, A5rms_int, A7rms_int, A9rms_int]];
     
            P(idx)rad_int = rand(1)*P(idx)rad;
            V_Ps = [V_Ps; [P3rad_int, P5rad_int, P7rad_int, P9rad_int]];
        end
    end

The first code works, but I would like to have a loop that performs A3rms_int all the way to A9rms_int in order to increase readability and be more efficient as I have variables all the way up to A25rms_int. And similarly, for the P variables.

Thank you in advance for your help!

[Mohammad Sami]

You should use cell arrays to store your data. For example.

Arms = cell(25,1);
for i=1:2:25
    Airms = Arms{i};
end

[Rik]

Mohammad, please move your comment to the answer section.

This issue is due to poor design. You should not store information in a variable name, that is what you have variables for.

Answer 1

[Mohammad Sami]

You should use cell arrays to store your data. For example.

Arms = cell(25,1);
for i=1:2:25
    Airms = Arms{i};
end