How to create a matrix using vectors(columns) from different matrices (in a structure) with different lengths?

So I have a structure that contain in its different cell a matrix os 2 columns and AROUND 1000 rows each. I want to be able to get the second column of each cell to create a matrix. I tried this using a look with an indexed matrix but it replies an error indicating that the size does not match.

Answer 1

[BhaTTa]

Here is the code to achieve it:

S = {rand(1000, 2), rand(1000, 2), rand(1000, 2)};
% Number of cells in the cell array
num_cells = numel(S);

% Initialize an empty array to store the second columns
% Assuming all matrices have the same number of rows
num_rows = size(S{1}, 1);
second_columns = zeros(num_rows, num_cells);

% Loop through each cell and extract the second column
for i = 1:num_cells
    second_columns(:, i) = S{i}(:, 2);
end

% Display the resulting matrix
disp('Matrix of second columns:');
disp(second_columns);