Counting occurrence of keys and values for Containers.Map in another Containers.Map

How it is possible to count occurrence of keys and values of Containers.Map A in B?

A = containers.Map({1026,1033,1038,1042},...
                  {[605.914,48.521],[490.6086 23.7932],[257.558,67.625],[439.090,225.924]});
              
              
              
B = containers.Map({1025,1026,1028,1029,1031,1033,1035,1037,1038},...
                  {[397.494,168.066],[605.914,48.521],[295.712,176.770],[226.249,209.288],...
                  [52.573,278.126],[490.6086 23.7932],[50.747,213.198],[38.992,4.417],[257.558,67.625]});

Thank you!!

Answer 1

[J. Alex Lee]

Just considering the keys, you can use ismember (though I'm not sure why there's a limitation that cells must be cell arrays of character vectors, and can't be numbers..)

[mask] = ismember(cell2mat(B.keys),cell2mat(A.keys))

cnt = sum(mask)

[mask] = ismember(B.keys,A.keys)

If you need to check if values are the same, you can iterate through the matched keys and use isequal()

[Ravindra]

Thank you Lee!!

The first two line works. The following command gives error :

[mask] = ismember(B.keys,A.keys)

Error using cell/ismember (line 34)
Input A of class cell and input B of class cell must be cell
arrays of character vectors, unless one is a character
vector.

I tried another way as well....

C = cell2mat(A.keys)
idx = find(cell2mat(B.keys)== C(1))
idx = find(cell2mat(B.keys)== C(2))
idx = find(cell2mat(B.keys)== C(4))

Thank you again!!

[J. Alex Lee]

Yes, sorry should have clarified the last line doesn't work, but seems like a silly limitation by TMW to me. Glad it helps!