Max - use cellfun to apply a function to each element in your array. In your case, you could use the length function to determine the lengths of each string or to determine which strings are a certain number of characters long. For example, using your x from above
n = 2;
idcs = cellfun(@length(str)==2,x);
will return
idcs =
0
1
0
0
0
which tells us that the second string in x is of length two. We can then remove that string easily enough by doing
x(idcs) = [];
The above call to cellfun takes an anonymous function as its first input parameter
@(str)length(str)==2
where str is a string element from our cell array x. We calculate the length of str and compare it to two, so that the output from this call is logical (true or false).
