question abt variable size array in a for loop

Hi there,

I am working with an ODE solver inside a for loop and am trying to save every iteration in a variable. The thing is because of some initial conditions which are generated by a random number generator, the final integrated solution has a variable size. I need every iteration to be saved to a variable but have run out of ideas. Tried preallocating as

num=5; X = zeros(10000,6,num);

and also by updating the variable X every iteration as

XX = []; for j = 1:num new_X = X len = length(X)

    for kkk = 1:len

        TT = zeros(len,j);

        XX(:,:) = [XX new_X];

    end

Thanks

Answer 1

[Andrew Newell]

Use cell arrays. If I understand your problem, you are saving num runs, so you could use code like this:

XX = cell(num,1);
for j = 1:num
  XX{j} = new_X;
end

If you haven't used cell arrays before, you would be well advised to read the documentation. In particular, to access the contents of a cell, use curly brackets.