String Reading Functions

Question

Jan Donyada 2011-9-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/16813-string-reading-functions

评论： NOR AZIEYANI 2018-12-4

I am writing a Malay language text to speech program. Its very simple; it reads the string from user input, matches it in the database, and plays the wave file in order of the user input. The database holds the .wav files of word, e.g. the word "saya" has a corresponding file saya.wav in the database. So far my code is:

function pushbutton1_Callback(hObject, eventdata, handles)
words = get(handles.editbox, 'string'); %scans user input string from editbox
wavdirectory = 'C:\Program Files\MATLAB\R2010b\Recordings\';
wordsstring = regexp(words, '\w+', 'match') ; %reads string only, ignores punctuation
[j, k] = size(wordsstring); %stores number of words in user input string
for m = 1:k
    thisfid = [wavdirectory wordsstring{m} '.wav'];
  try
    [y, fs] = wavread(thisfid);
    sound(y, fs);
  catch
    fprintf(1,'Failed to process file wave "%s" because: ', thisfid);
    lasterror
  end
end

The database holds base words as well as various prefixes and suffixes. However, a word containing prefix-base-suffix (scanned using regexp)cannot be matched in the database by its name unless it is first broken up into its prefix, base word, and suffix components. But I am at a loss as to how to do it in matlab language. As of now the program can only read out base words (without prefix or suffix). Regexp separates the user input sentence into individual words. From there, if a prefix-base-suffix word is read, the following pseudocode should kick in:

if no_match
%scan *FIRST FOUR* characters of no_match for matching prefixes in database. 4 is chosen because the prefixes only go up to 4 letters in Malay.
i=4;
if match 
%cut those characters from no_match and store in word_prefix e.g bercakap => "ber"(prefix) "cakap" (remainder) and so "ber" stored in word_prefix and "cakap" stored in word_remainder
else i--; %decrement i by 1 for every mismatch
if i=1; %in Malay there are no 1-letter prefixes
stop
sound(prefix);                                        %or perhaps throw back into try function? possible?
scan word_remainder
%if still no match in database for word_remainder, scan *LAST THREE* letters of word_remainder for suffixes. 3 is chosen because suffixes only go up to 3 letters in Malay.
j = 3;
%scan last 3 characters of word_remainder for matching suffixes in database
if match
%cut from word_remainder and store in word_suffix, the remaining word will be stored under base_word;
else j--; %decrement j by 1 for every mismatch
if j=0, 
stop

Examples of input/output for the pseudocode section should look like this:

menghapuskan => "meng" (word_prefix) "hapus" (base_word) "kan" (word_suffix)

menghadiri => "meng" (word_prefix) "hadir" (base_word) "i" (word_suffix)

sound (y, fs) should play the broken up word in prefix-base-suffix order, as well as in the sentence, e.g. "Saya menghapuskan dia" should be "Saya" "meng" "hapus" "kan" "dia".

What function(s) do I use to do the scanning & separating of words with the prefix-base-suffix structure, as per my pseudocode?

Thanks in advance.

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NOR AZIEYANI 2018-12-4

Can I get this project with full code because it's quit similar with the what I.'m working out right now.

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Answer 1

Fangjun Jiang 2011-9-27

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/16813-string-reading-functions#answer_22680

在 MATLAB Online 中打开

I don't think there is a readily available function right for it. To separate a word, it's pretty easy, especially when the number of letters is fixed for prefix and suffix.

Word='menghapuskan'
Prefix=Word(1:4);
Suffix=Word(end-2:end);
BaseWord=Word(5:end-3);

The most useful function to scan a word is still regexp(), or strfind(), findstr(). To replace, regexprep(), strrep(). To compare, strcmp(), strcmpi(), strmatch().

type help strfun to find out more.