Concatenate all arrays from a field in a structure

I have a structure with a size 1 x 10845 and 4 fields. Each of the 10845 values consists of arrays with various lengths.

The struct is named S and it looks like this:

I want to extract all these values and concatenate them into a new array. So essentially, I want 4 different arrays for the four fields, consisting of all the values in the struct, put together as a long array.

I've tried to implement the code with the following for loop, but I get the error

for 1 = 0:length(S.A)
    A_combined = S.A(i);
end

"Error using length

Too many input arguments."

I've also tried using arrayfun(@(x) copy(x.A), S);

but I get the following error:

"Undefined function 'copy' for input arguments of type 'double'."

I've been struggling with this problem for a few days now and I can't find the solution. Do I have the wrong approach or am I missing something?

Answer 1

[Stephen23]

Where S is your structure:

A = vertcat(S.A)
B = vertcat(S.B)
etc.

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

Answer 2

[Image Analyst]

Did you try

allA = [S.A]

? Or try vertcat or horzcat

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

We can't test our code with an image of your variable, we need the actual variable.