Question
Hello, I use this code which is linked to a Simulink file to simulate and get data used for Artificial Neural Network. The data shown below are saved in structur format and each case contains 30001 data. So I want to arrange data to get only one matrix with 2 rows and (30001*6) lines by modifying the matlab code or, save directly the data acquired from MDL file under a matrix of 2 lines and 180006 lines. Thank you. j=1; for ref_P=10:1:12; for ref_Q=-10:1:-9; options = simset('SrcWorkspace','current'); S = sim('gti_V3_15_NN',[],options); %%%%%%%%%%%%%%%%%%%%%%%%%%% Delta =data_out(:,1); % from workspace Vom =data_out(:,2); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% out(j).Delta=Delta; out(j).Vom=Vom; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Ref_P(j,1) = ref_P; Ref_Q(j,1) = ref_Q; %%%%%%%%%%%%%%%%%%%%%%%%%%% j= j+1; end end
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Expert Answer
John Michell
PhD Expert
Answered Aug 13, 2026
You could likely extract and concatenate this data using a for loop or two, but a more elegent solution may be in using struct2cell(). Your fields will become a column vector of cells with their values being stored in a 3rd dimensional vector. From these, you could extract the data you're looking for using vertcat and brace indexing—See Below:
%% Setup:
bear = struct;
bear(1).paw = (1:100)';
bear(2).paw = (101:200)';
bear(3).paw = (201:300)';
bear(1).tail = (300:-1:201)';
bear(2).tail = (200:-1:101)';
bear(3).tail = (100:-1:1)';
%% Execution:
tempCell = struct2cell(bear);
vertPaw = vertcat(tempCell{1,1,:}); % Paw is the 1st row, 1st column entry of the cell array
vertTail = vertcat(tempCell{2,1,:}); % Tail is the 2nd row, 1st column entry of the cell array
horzVert = [vertPaw, vertTail]
horzVert = 300×2
1 300
2 299
3 298
4 297
5 296
6 295
7 294
8 293
9 292
10 291
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