How to create a function that returns an acronym in matlab [duplicate]

This question already has answers here: 开发者_如何学Go How can I create an acronym from a string in MATLAB? (2 answers) Closed 9 years ago.

I need to create an m-file in Matlab that contains the following function:

function acr = acronym(phrase)

This function should compute and returns the acronym of the phrase as the result of the function; that is, if someone types any phrase in Matlab, this function should return an acronym consisting of the first letter of every word in that phrase. I know that it’s a simple function, but my coding experience is very limited and any help would be appreciated; thanks in advance.

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This is a great place to use regular expressions. The function regexp takes in a string and a regular expression and returns the starting indices for each substring that matches the regular expression. In this case, you want to match any character that starts a word. \<expr matches expr when it occurs at the start of a word (See the documentation for regexp). A period matches any character. So the regular expression to match the first character of any word is \<.. Thus,

regexp(phrase,'\<.')

will return the indices for the first letter of each word in phrase. So an acronym function could be:

function acr = acronym(phrase)
    ind = regexp(phrase, '\<.');
    acr = upper(phrase(ind));
end

Or even just

function acr = acronym(phrase)
    acr = upper(phrase(regexp(phrase, '\<.')));
end

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You can use textscan to read a formatted text file as well as a formatted string. Then you just have to keep the first letter of each word:

phrase='ceci est une phrase';
words=textscan(phrase,'%s','delimiter',' ');
words=words{:};
letters=cellfun(@(x) x(1),words);
acronym=upper(letters');

---

function output = acronym( input )
  words_cell = textscan(input,'%s','delimiter',' ');
  words      = words_cell{ : };
  letters    = cellfun(@(x) textscan(x,'%c%*s'), words);
  output     = upper(letters');
end

EDIT: Just noticed a very similar answer has already been given!