Storing output values from a nested while loop

Question

Harrison 2018-3-15

0
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https://ww2.mathworks.cn/matlabcentral/answers/388588-storing-output-values-from-a-nested-while-loop

回答： vijaya lakshmi 2018-3-21

How can I get the values for "gens" to change after every loop and store it in the row vector that I created?

    prob_vec=[0.2 0.5 0.3]; % prob of having a male offspring 
max_son=length(prob_vec)-1; % max amount of sons 
cum_prob=cumsum(prob_vec);
sim=3;
men=1;
extinct=0;
gens=0;  
total_gens=(0);  %running total
 for n=1:sim
    while (men > 0) && (men < 100)
         % Array of random numbers to determine # of kids for each person.
         num=rand(men,1);
         % Increment the number of generations.
         gens=gens+1;
         % Number of men in the next generation.
         men=0;
         for j=1:max_son
             %finds indices of men who have j male offspring 
             men = men + j * length(find((num>cum_prob(j)) & (num<=cum_prob(j+1))));
         end % end of for loop for max sons
        if(men==0)
             extinct=1;
             break;
        end
    end %end of while loop 
    total_gens(n+1)=total_gens(n)+gens; % the loop uses the same value of gen 3 times 
end % end of the for loop 
   total_gens(1)=[]; deletes the first element which is 0 from the array
    avg=mean(total_gens); %finds the average of the array