Input A of class cell and input B of class double must be cell arrays of strings, unless one is a string

Question

wesso Dadoyan 2016-5-30

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回答： Image Analyst 2016-5-30

    A= 
    89830410
    50590220
    '33762X10'
    '02837P30'
    57832110
    '25037Y10'
    13063010
    '09972F10'
    B=
    89830410
    50590220
    '33762X10'
    for i=1:length(B)
        x0=find(ismember(A,B{i}));
    end

is giving me error.

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

How can i match A to B(i)without error.

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Image Analyst 2016-5-30

Tell us why A is not ALL strings. Why are there doubles/scalars in there (rows 1,2,5 and 7)? Maybe you can convert then to strings and then do the ismember.

wesso Dadoyan 2016-5-30

I had data in a table format. I extracted columns A and B. I didn't create the data format. In the original table the double and strings were combined in the column.How can I convert all of them to string?

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Answer 1

Image Analyst 2016-5-30

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在 MATLAB Online 中打开

You can get a matrix of what element of A matches what element of B using isequal() and iterating over all possible comparisons/pairs.

A= {...
  89830410
  50590220
  '33762X10'
  '02837P30'
  57832110
  '25037Y10'
  13063010
  '09972F10'}
B={...
  89830410
  50590220
  '33762X10'}
lenA = length(A);
lenB = length(B);
matches = false(lenA, lenB);
for ka = 1 : lenA
  for kb = 1 : lenB
    if isequal(A(ka), B(kb))
      matches(ka, kb) = true;
    end
  end
end
% Print to command window:
matches

Results:

This will work regardless if the contents of the cells of A and B are strings or numbers. The output matches matrix is basically saying that A(1) matches B(1), A(2) matches B(2), and A(3) matches B(3).

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Answer 2

John BG 2016-5-30

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https://ww2.mathworks.cn/matlabcentral/answers/286493-input-a-of-class-cell-and-input-b-of-class-double-must-be-cell-arrays-of-strings-unless-one-is-a-st#answer_223898

在 MATLAB Online 中打开

Mr Dadoyan

please check if you find the following useful:

A= [
'89830410';
'50590220';
'33762X10';
'02837P30';
'57832110';
'25037Y10';
'13063010';
'09972F10';]
B=['89830410';
'50590220';
'33762X10';]
x0=ismember(A,B,'rows')
 =
     1
     1
     1
     0
     0
     0
     0
     0

there is no need for a loop if you use the option 'rows' in ismember.

To get the common elements

(find(x0>0),:)
ans =
89830410
50590220
33762X10

If you find this answer of any help solving your question,

please click on the thumbs-up vote link, or mark it as accepted answer

thanks in advance

John

jgb2012@sky.com

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wesso Dadoyan 2016-5-30

thanks john. the format is a mix of double and strings and not only strings. I received the same error

Warning: The 'rows' input is not supported for cell array inputs. > In cellismemberlegacy (line 47) In cell/ismember (line 91) In Step25CorrectionDSIds (line 5) Error using cell/ismember (line 34) Input A of class cell and input B of class cell must be cell arrays of strings, unless one is a string.

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