Logical indexing in cell array

2016 10 14
4 个回答
回答已采纳
更新时间：2021 7 4
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1 个投票

Is there a way to search strings in a cell array similar to numeric arrays?
a = [1 2 3 4 5 6];
>> idx = find(a==3)
idx = 3
>> b = {'1' '2' '3' '4' '5' '6'};
>> idx = find(b=='3')
Undefined function 'eq' for input arguments of type 'cell'.

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 采纳的回答

Image Analyst
Image Analyst 2016-10-14

5 个投票

Use ismember to search cell arrays:
b = {'1' '2' '3' '4' '5' '6'};
logicalIndex = ismember(b, '3') % Or...
actualIndex = find(ismember(b, '3'))

更多回答（3 个）

michio
michio 2016-10-14

1 个投票

Using cellfun is one way.
b = {'1' '2' '3' '4' '5' '6'};
cellfun(@(x) strcmp(x,'3'), b)

0 个投票

Now, what michio suggested works perfectly ok:
b = {'1' '2' '3' '4' '5' '6'};
b(cellfun(@(x) strcmp(x,'3'), b))={'Found 3'}
So this is another good solution for this exercise.

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