Logical indexing in cell array

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'.

Answer 1

[Image Analyst]

Use ismember to search cell arrays:

b = {'1' '2' '3' '4' '5' '6'};
logicalIndex = ismember(b, '3')  % Or...
actualIndex = find(ismember(b, '3'))

Answer 2

[Ganesh Hegade]

Hi, You can use this

   strcmp(b, '3');

[matuser123]

Great! Thanks.

    find(strcmp(b,'3')==1)

Answer 3

[michio]

Using cellfun is one way.

b = {'1' '2' '3' '4' '5' '6'};
cellfun(@(x) strcmp(x,'3'), b)

[michio]

Aha, strcmp does accept cell array. Thank Ganesh.

Answer 4

[Sulaymon Eshkabilov]

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.