How to use find function to find input of 'cell' type?

Question

C Zeng 2015-4-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/203749-how-to-use-find-function-to-find-input-of-cell-type

编辑： Image Analyst 2015-4-16

Hello, I have 'raw' as an array of all cells read from excel (number or non-number). I would like to find the row numbers where the cell is 'ABC', and return the first row.

When I use 'find' function it returns an error:

>>find(raw, 'ABC','first')
Undefined function 'find' for input arguments of type 'cell'.

Is there a way to find the row for a cell content in Matlab? If so, how can I find the row of both that one vector having some cell, and another vector having another cell?

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Image Analyst 2015-4-15

No it's not. But see if my answer below is okay.

C Zeng 2015-4-15

Thanks!

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Answer 1

Image Analyst 2015-4-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/203749-how-to-use-find-function-to-find-input-of-cell-type#answer_175394

在 MATLAB Online 中打开

ca = {'abc', 'def'; 
  'abcx', 'row 2'; 
  'yy', 'row 2 abc'; 
  'zzzz', 'abc'; 
  'abc', 'line 3'}
[ia, ib] = ismember(ca, 'abc')
firstRow = find(ia(:, 1), 1, 'first')

In the command window:

ca = 
    'abc'     'def'      
    'abcx'    'row 2'    
    'yy'      'row 2 abc'
    'zzzz'    'abc'      
    'abc'     'line 3'   
ia =
     1     0
     0     0
     0     0
     0     1
     1     0
ib =
     1     0
     0     0
     0     0
     0     1
     1     0
firstRow =
     1

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C Zeng 2015-4-15

编辑：C Zeng 2015-4-15

What if I want to find out which row return number j (j changes in the loop), where the column vector is of cells.

if I input: ismember(list, 'j'); it returns an error: Input A of class cell and input B of class cell must be cell arrays of strings, unless one is a string.

Thanks!