String matrix compare to get common in rows

Deal all, i have a problem to compare two string matrix :

A1 = {'AA', 'b' ; 'cc', 'ff'}
A2 = {'ee', 'AA' ; 'hhh', 'm'}
strcmp(A1,A2)

I get

A1 = 
    'AA'    'b' 
    'cc'    'ff'

A2 = 
    'ee'     'AA'
    'hhh'    'm'
ans =

     0     0
     0     0

But i need to get

'AA' is common between A1 iand A2 in the row 1

Best regard

Answer 1

[Stephen23]

>> A1 = {'AA', 'b' ; 'cc', 'ff' ; 'tt', 'kk'; 'XX', 'b'; 'AA', 'b'};
>> A2 = {'ee', 'AA' ; 'hhh', 'm'; 'kk', 'o'; 'ee', 'XX'; 'AA', 'b'};
>> X = cell2mat(cellfun(@ismember,num2cell(A1,2),num2cell(A2,2),'uni',0));
>> [R,~] = find(X);
>> [~,Y] = sort(R);
>> C = [A1(X),num2cell(R)].';
>> fprintf('''%s'' common at row %d\n',C{:,Y})
'AA' common at row 1
'kk' common at row 3
'XX' common at row 4
'AA' common at row 5
'b' common at row 5

[Touts Touts]

Dear Stephen Cobeldick

Its work parfectely, please is it possible to ignore the empty values

A1 = {'AA', '', 'cc', 'ff' ; 'tt', 'kk', 'XX', 'ee'}
A2 = {'ee', 'AA', 'hhh', ''; 'kk', 'o', 'ee', 'XX'}
X = cell2mat(cellfun(@ismember,num2cell(A1,2),num2cell(A2,2),'uni',0));
[R,~] = find(X);
[~,Y] = sort(R);
C = [A1(X),num2cell(R)].';
fprintf('''%s'' common at row %d\n',C{:,Y})
'AA' common at row 1
'' common at row 1
'kk' common at row 2
'XX' common at row 2
'ee' common at row 2

ignore this cas

'' common at row 1

Thanks a lot

[Stephen23]

"...is it possible to ignore the empty values"

Of course, just add this line after X is defined:

X = X & ~cellfun(@isempty,A1);

[Touts Touts]

Thanks a lot dear Stephen Cobeldick

Answer 2

[Geoff Hayes]

Touts - consider using ismember to check to see if any string of A1 matches with any string of A2

>> ismember(A1,A2)

ans =

     1     0
     0     0

[Touts Touts]

Dear Geoff Hayes

Its work, please, my real problem have a larg matrix, so is there any way to get

The common 'AA' and its rows lik this

'AA' : 1

Best regard

[Geoff Hayes]

So if 'AA' is in the second row, do you expect to see

'AA' : 2

? What happens if 'AA' is in more than one row?

[Touts Touts]

Dear Geoff Hayes

Not only the 'AA', but all the common string between A1 iand A2

A1 = {'AA', 'b' ; 'cc', 'ff' ; 'tt', 'kk'}
A2 = {'ee', 'AA' ; 'hhh', 'm'; 'kk', 'o'}
ismember(A1,A2)

so

A1 = 
    'AA'    'b' 
    'cc'    'ff'
    'tt'    'kk'
A2 = 
    'ee'     'AA'
    'hhh'    'm' 
    'kk'     'o' 
ans =
     1     0
     0     0
     0     1     

Please i need to get

'AA' is common between A1 and A2 in the row 1

'kk' is common between A1 and A2 in the row 3

Best regard

[Stephen23]

@Touts Touts: repeating and clarifying Geoff Hayes's questions, which you did not answer:

1. what happens if 'AA' occurs on different rows?
2. what happens if 'AA' occurs multiple times within one matrix?

[Touts Touts]

Dear Stephen Cobeldick and Geoff Hayes

Please, i need all the common between A1 and A2 and their rows

A1 = {'AA', 'b' ; 'cc', 'ff' ; 'tt', 'kk'; 'XX', 'b'; 'AA', 'b'}
A2 = {'ee', 'AA' ; 'hhh', 'm'; 'kk', 'o'; 'ee', 'XX'; 'AA', 'b'}

so

A1 = 
    'AA'    'b' 
    'cc'    'ff'
    'tt'    'kk'
    'XX'    'b' 
    'AA'    'b' 
A2 = 
    'ee'     'AA'
    'hhh'    'm' 
    'kk'     'o' 
    'ee'     'XX'
    'AA'     'b' 

I need

• 'AA' common at row N° :1
• 'kk' common at row N° :3
• 'XX' common at row N° :4
• 'AA' common at row N° :5
• 'b' common at row N° :5

Any common at any row

Best regard