Accessing and using struct array using vectorization

Hello,

I have a cell array structured like this:

list_el =

  36×3 cell array

    {[  1 3]}    {0×0 double}    {0×0 double}
    {[  1 5]}    {0×0 double}    {0×0 double}
    {[  1 7]}    {0×0 double}    {[     3 5]}
	...

And I use this loop to extract data to another matrix. I wonder if there is a way using vectorization to do this?

aa = zeros(size(list_el,1),2);
for i = 1: size(list_el,1)
    aa(i,:) = list_el{i,1};
end
	

Thank you!

[Stephen23]

"I wonder if there is a way using vectorization to do this?"

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/1656435-tutorial-comma-separated-lists-and-how-to-use-them

[Walter Roberson]

common would be to use cell2mat(list_el(:, 1)) and assume that function is coded well.

Answer 1

[Voss]

aa = vertcat(list_el{:,1});

[Walter Roberson]

This would be more efficient than cell2mat, and can work for some datatype that cell2mat does not support. However it is typically only suitable when the cell is a vector

[Askic V]

Walter and Voss, thank you very much for your answer. They are exactly what I was looking for. Cheers!

[Voss]

You're welcome!