MATLAB: Replacing the strings with a specific length in a cell

cell arraycellfunlengthreplacestring

I want to replace the strings with lenght>=3 with 'm' in the second column of the following cell(without using a loop). So I want to get b from a. Any suggestion? thanks a lot
a =
    '1'    'aaaa'
    '2'    'a'   
    '3'    'aa'  
    '4'    'aaa'
b =
    '1'    'm' 
    '2'    'a' 
    '3'    'aa'
    '4'    'm'

Best Answer

n   = 3;
idx = cellfun('prodofsize',a(:,2)) >= n;
a(idx, 2) = {'m'};
Note, however that cellfun is a concealed loop.
Related Question