How to find a element in cell array

hi! I have a problem with matlab: I have a string cell array with variousty size (1024*1) and i must be find one string if it is in cell array and location of it in cell array. any one help me? thank ect

s{1,1}={'01'    '02'    '0123'    '04'    '14'    '0124'    '34'    '03'    '0134'    '23'    '24'    '0234'    '12'    '13'    '1234'}
s{2,1}= {'012'    '024'    '3'    '034'    '023'    '1'    '123'    '013'    '4'    '014'    '134'    '2'    '234'    '124'    '0'}

i must find '4' if is appear in s and location of '4' in cell array s.

[Stephen23]

Although this has already been accepted, there is a neater solution using a better data structure of a cell array of strings (rather than cell array of cell arrays), together with strfind. This returns the location indices in a cell array the same size as s:

>> s(2,:)={'012','024','3','034','023','1','123','013','4','014','134'};
>> s(1,:)={'01','02','0123','04','14','0124','34','03','0134','23','24'};
>> strfind(s,'4')
ans = 
    []     []    []    [2]    [2]    [4]    [2]    []    [4]     []    [2]
    []    [3]    []    [3]     []     []     []    []    [1]    [3]    [3]

Answer 1

[Andrei Bobrov]

out = cellfun(@(x)regexp(x,'4'),s,'un',0);

ADDED on Nguyen's answer :)

out = cellfun(@(x)regexp(x,'^4$'),s,'un',0)

or:

out = cellfun(@(x)ismember(x,'4'),s,'un',0)

[Nguyen Trung]

thank you very much! but i want to know the location of element which i find in cell array, how can i do?

[Image Analyst]

mhm's "flag" moved here so that it is a comment rather than a flag: Then I removed the flag.

find element in cell

[ibrahim Salim]

Hello, I'd like to ask How can I delete zeros(logical values) from cell 'out'? Thanks

Answer 2

[Richard Brown]

Can you define your cell array differently (can it be a 2D cell array, rather than a cell array of cell arrays?) If so, then

s(1,:)={'01'    '02'    '0123'    '04'    '14'    '0124'    '34'    '03'    '0134'    '23'    '24'    '0234'    '12'    '13'    '1234'}
s(2,:)= {'012'    '024'    '3'    '034'    '023'    '1'    '123'    '013'    '4'    '014'    '134'    '2'    '234'    '124'    '0'}

[I, J] = find(strcmp(s, '4'))

[Nguyen Trung]

you can check your define? If i define follow your advice, matlab had an error:

"Assignment has more non-singleton rhs dimensions than non-singleton subscripts"

And it had no result. Thank any way, any body help me?

[Richard Brown]

Try clear s first

[Nguyen Trung]

Ok! thanks! But the cell array i have is generated by my function and i don't know how to save similar to your answer! Can you help me?

[Richard Brown]

OK, so long as each entry of s has the same number of entries (15 in this case), then first run

s = vertcat(s{:})