MATLAB: How to find the common elements of 2 cell arrays of strings

commonelementsfindintersectintersectionMATLAB

I have 2 cell arrays containing strings. I would like to find the elements that are common to both arrays and get their positions. Is there a function to do that?

Best Answer

Use the "intersect" function as follows:

>> [C,ia,ib] = intersect(A,B, 'stable');

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MATLAB: How to find the elements of a cell array that are not common to another cell array

Use the "intersect" function to find the intersection of both arrays. Then, remove from one array the elements that are common to the other array:

       % Find the intersection
       [C,ia,ib] = intersect(A,B, 'stable');
       % Remove from A the intersection of A and B
       AminusB = A;
       AminusB(ia) = [];

MATLAB: How to find a common part of the strings

If you have the strings in a cell array of strings, Scell, then

Schar = char(Scell(:));
all_rows_same = all(diff(Schar == 0, 1),1);
common_cols = find(~all_rows_same, 1, 'first');
if isempty(common_cols)
  common_to_use = '?'
else
  common_to_use = Scell{1}(1:common_cols);
end

This finds the longest leading substring common to all entries in the cell array and uses that; however if there is no leading substring that is common to all of them then it uses '?' just to have something .

Best Answer

Related Solutions

MATLAB: How to find the elements of a cell array that are not common to another cell array

MATLAB: How to find a common part of the strings

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