Preallocating an array or a vector in matlab before a for loop

I have several variables that I want to preallocate in my code before my for loop. I was hoping someone could show me the correct way to write this preaalocation. Currently it looks like this but it is giving me errors

k = 1:24; 
sigma_infty = zeros(length(:,k));
eps_infty = zeros(length(:,k));
for k = k
    %
    sigma_infty(:,k) = [10*k 0 0 0 0 0]';
    %
    eps_infty(:,k) = S2*sigma_infty(:,k);
end

I keep getting told that I length and/or zeros is an unregognised function and I am unsure how to write the corrct preallocation.

Could someone please clarify how to correctly allocate these variable for me?

Thanks

Alex

Answer 1

[KSSV]

N = 24 ; 
sigma_infty = zeros(6,N);
eps_infty = zeros(6,N);
for k = 1:N
    %
    sigma_infty(:,k) = [10*k 0 0 0 0 0]';
    %
    eps_infty(:,k) = S2*sigma_infty(:,k);
end

[A Poyser]

awesome thanks

Answer 2

[KSSV]

Thanks is accepting and/or voting the answer. :)

[A Poyser]

got it :thumbs up: