MATLAB: Checking to see if a character is in a string array, then deleting entries where this character isn’t in a string

Question

I have a string array that is just a list of words (dictionary), a random word (word) is selected and I want to loop though the alphabet, then if, say 'a' isn't in my random word it will delete all entries in my string array that contain 'a' etc. (Warning you now, I'm new to matlab).

for i=alphabet;
    if i==word;
         strfind(dictionary,i);
         sel(i)=true;
    end
end
rows=find(sel);
newdictionary=dictionary(sel);

this isn't working, so any help with fixing it would be really appreciated

Answer 1

To delete all entries with an 'a' from your dictionary

 dictionary = {'a' 'b' 'ba' 'c' 'hallo'};
 idx = ~cellfun(@isempty, strfind(dictionary, 'a'));
 dictionary(idx) = [];

To select a random word from your dictionary

word = dictionary(randi(numel(dictionary)));

Now you can loop over the characters in word to remove all entries in dictionary that have this character.