Keep selected rows in a struct file

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SChow
SChow on 20 May 2021
Edited: SChow on 20 May 2021
Hello,
I have a 600x1 struct file with 5 fields. One of the field is 'labels', containing random numbers from 1 to 1000. and a separate array (jn) 1x 500 containg 500 integers.
I am trying to remove the rows in the struct file with 'labels' which do not match the integers in the 'labels' array.
The solutions already on internet does not seem to work for me.
Thanks
I tried the following, where S is the struct and jn is the array
jn=num2cell(jn);
idx = ismember({S.labels}', jn);
Sx = S(idx);
The following error appears
Error using cell/ismember (line 34)
Input A of class cell and input B of class char must be cell arrays of character vectors, unless one is a character vector.
  4 Comments
SChow
SChow on 20 May 2021
Edited: SChow on 20 May 2021
Many thanks Stephen, I think that the issue is solved now!!

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Accepted Answer

SChow
SChow on 20 May 2021
Edited: SChow on 20 May 2021
%%jn is the array, (not converted to cell array that I was originally
%%converting it to , and I should have used square brackets instead of curly brackets)
idx = ismember([S.loc_id]', jn);
Sx = S(idx);

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