MATLAB Answers

When i covert a structure to cell array, my fieldNames disappear

1 view (last 30 days)
Shambhavi Adhikari
Shambhavi Adhikari on 10 Mar 2021
Edited: Jorg Woehl on 11 Mar 2021
I am trying to convert a structure to a cell array, when i do that, i am not able to see field on my new cell array, i only see values. Is there a way to have both field and values on the cell array?

Answers (3)

Fangjun Jiang
Fangjun Jiang on 10 Mar 2021
There is no meta data text info for cell array. Use struct2table() to convert structure to table.
  2 Comments

Sign in to comment.


ANKUR KUMAR
ANKUR KUMAR on 10 Mar 2021
"Is there a way to have both field and values on the cell array?"
Let us create a sample structure
S.x = linspace(0,4*pi);
S.y = cos(S.x);
You can use fieldnames and struct2cell to extract the values:
name=fieldnames(S);
value=struct2cell(S);

Jorg Woehl
Jorg Woehl on 10 Mar 2021
Edited: Jorg Woehl on 11 Mar 2021
Shambhavi, you can use fieldnames to extract the fieldnames from your structure and add it to the end of your new cell array. For example, taking this 1-by-2 structure array from the MATLAB documentation:
% sample structure
field1 = 'f1'; value1 = zeros(1,10);
field2 = 'f2'; value2 = {'a', 'b'};
field3 = 'f3'; value3 = {pi, pi.^2};
field4 = 'f4'; value4 = {'fourth'};
s = struct(field1,value1,field2,value2,field3,value3,field4,value4);
% write data from structure to cell array
sCell = struct2cell(s);
% add fieldnames to cell array
sCell(:,:,end+1) = fieldnames(s);
sCell(:,:,1) to sCell(:,:,end-1) now contain your data, while sCell(:,:,end) contains your fieldnames.
If you prefer to have the fieldnames listed first, in sCell(:,:,1), followed by your data in sCell(:,:,2) to sCell(:,:,end), issue the following command after the above:
sCell = circshift(sCell,1,3);

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!