How to count a specific string in a cell array?

Question

Hadi Ghahremannezhad 2017-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/331442-how-to-count-a-specific-string-in-a-cell-array

评论： BN 2020-4-11

采纳的回答： KSSV

在 MATLAB Online 中打开

I'm trying to count the number of occurrences of a word in a cell array. For example if the cell is like this:

c = {'car' , 'tree' , 'car' , 'bag' , 'horse' , 'car' , 'tree'}

I want to count the number of occurrences of strings in the cell. For example if I search for the number of string 'water' it would result in *0*. Or if I search for the number of 'car', it would result in *3*. How can I do this?

Thanks in advance

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Answer 1

KSSV 2017-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/331442-how-to-count-a-specific-string-in-a-cell-array#answer_259963

在 MATLAB Online 中打开

c = {'car' , 'tree' , 'car' , 'bag' , 'horse' , 'car' , 'tree'} ;
idx = strfind(c, 'car');
idx = find(not(cellfun('isempty', idx)));
N = length(idx)

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Hadi Ghahremannezhad 2017-3-23

Thanks a lot. It works very fine.

KSSV 2017-3-23

@ Hadi Ghahremannezhad Stephen Cobeldick's answer is perfect one...

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Answer 2

Stephen23 2017-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/331442-how-to-count-a-specific-string-in-a-cell-array#answer_259965

在 MATLAB Online 中打开

>> c = {'car' , 'tree' , 'car' , 'bag' , 'horse' , 'car' , 'tree'};
>> nnz(strcmp(c,'water'))
ans =
     0
>> nnz(strcmp(c,'car'))
ans =
     3

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Hadi Ghahremannezhad 2017-3-23

@KSSV This works great and simple. thanks

BN 2020-4-11

Thanks from 2020, It's Amazing approach, Thank You Dear Stephen Cobeldick. +1

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