How do I find all the words with a certain letter, when I have a cell array of strings?

How do I find all the words with a certain letter(d), when I have a cell array of strings?

For example I have a shopping list. And I want to turn this into 0's and 1's. 1's being where a word is that contains this letter(d)

Answer 1

[Image Analyst]

Try this:

ca = {'How' 'do' 'I' 'find' 'all' 'the' 'words' 'with' 'a' 'certain' 'letter'}
containsLetter = false(1, length(ca));
for k = 1 : length(ca)
  if ~isempty(strfind(ca{k}, 'd'))
    containsLetter(k) = true;
  end
end
% Print to command window the indexes that have it
logicalIndexes = containsLetter
numericalIndexes = find(containsLetter)

See in command window:

ca = 
    'How'    'do'    'I'    'find'    'all'    'the'    'words'    'with'    'a'    'certain'    'letter'
logicalIndexes =
     0     1     0     1     0     0     1     0     0     0     0
numericalIndexes =
     2     4     7