Can this for loop be vectorized?

The for loop below runs over the third dimension (page) to fill the alpha array. Is it possible to vectorize this for loop?

alpha_i_h_t = NaN(N_i,N_t,N_draws); 

for i = 1:N_draws
    alpha_i_h_t(:,:,i) = e_i_h(:,i) + e_h * t; 
end

[Torsten]

e_i_h(:,i) is a column vector. For e_i_h(:,i) + e_h * t to be defined, e_h * t must be a column vector or a scalar.

So how do you want to write a column vector into a matrix array alpha_i_h_t(:,:,i) ?

[Bruno Luong]

No Torsen because MATLAB auto-expansion.

Answer 1

[Bruno Luong]

e_i_h_reshape = reshape(e_i_h,N_i,1,N_draws);
alpha_i_h_t = e_i_h_reshape + e_h * t; 

[Snoopy]

Thank you very much.

[Torsten]

And why do you need a three-dimensional array for a two-dimensional content ?

Or do I get something wrong ?

[Bruno Luong]

The result is 3D, each page contains a matrix sum of column by row vector.