Problem 43671. Words Count: A Cell Array Approach

Created by Peng Liu

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Given an input character vector consisting of words, punctuation marks, white spaces, and possibly newline characters (\n), arrange the unique words alphabetically in a cell array of character vectors (formerly called <a href = "https://www.mathworks.com/help/matlab/matlab_prog/cell-arrays-of-strings.html">cell array of strings</a>) and calculate the histogram count of every unique word.Assumptions:<ol><li>Case is insensitive, e.g., WORDS and words are treated as the same word, and you may return in the output cell array either the uppercase or lowercase.</li><li>Punctuation marks are limited only to comma (,), period (.), colon (:), semi-colon (;), question mark (?), and exclamation mark (!).</li></ol>For example, given the input txt as a character vector,<pre class="language-matlab">txt = 'I love MATLAB and Cody, but I don''t like trivial matlab problems on cody.';
</pre>the outputs should be<pre class="language-matlab">words = {'and';'but';'Cody';'don''t';'I';'like';'love';'MATLAB';...
 'on';'problems';'trivial'};
count = [1; 1; 2; 1; 2; 1; 1; 2; 1; 1; 1];
</pre>Hint: The cell array of strings approach is the dual of the string array approach, i.e., things that can be done via the <a href = "http://www.mathworks.com/matlabcentral/cody/problems/43670-words-count-a-string-array-approach">string arrays approach</a> can also be done using the cell array approach.Related problems in this series:<ul><li><a href = "http://www.mathworks.com/matlabcentral/cody/problems/43670-words-count-a-string-array-approach">Words Count: A String Array Approach</a></li><li>Words Count: A Cell Array Approach</li></ul>

Given an input character vector consisting of words, punctuation marks, white spaces, and possibly newline characters (\n), arrange the unique words alphabetically in a cell array of character vectors (formerly called <https://www.mathworks.com/help/matlab/matlab_prog/cell-arrays-of-strings.html cell array of strings>) and calculate the histogram count of every unique word.

Assumptions:

# Case is insensitive, e.g., WORDS and words are treated as the same word, and you may return in the output cell array either the uppercase or lowercase.
# Punctuation marks are limited only to comma (,), period (.), colon (:), semi-colon (;), question mark (?), and exclamation mark (!).

For example, given the input txt as a character vector,

txt = 'I love MATLAB and Cody, but I don''t like trivial matlab problems on cody.';

the outputs should be

words = {'and';'but';'Cody';'don''t';'I';'like';'love';'MATLAB';...
           'on';'problems';'trivial'};
  count = [1; 1; 2; 1; 2; 1; 1; 2; 1; 1; 1];

Hint: The cell array of strings approach is the dual of the string array approach, i.e., things that can be done via the <http://www.mathworks.com/matlabcentral/cody/problems/43670-words-count-a-string-array-approach string arrays approach> can also be done using the cell array approach.

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Problem 43671. Words Count: A Cell Array Approach

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