Effacer les filtres
Effacer les filtres

Remove "( )" from string words

11 vues (au cours des 30 derniers jours)
Isay
Isay le 18 Oct 2014
Commenté : Jan le 19 Oct 2014

Hi I need to Remove "()" from any word in DataBase.

My Database(cell) have string words such as:

'NEW' 'May' '(AFP)' 'US' 'prosecutors' 'on' 'Friday' 'unveiled' 'indictment' 'including' 'charges' 'of' 'murder' 'and' 'loan' 'sharking' 'against' . . . .

So, I need to Remove "(" and ")" from (AFP). because My word should be : AFP

Réponse acceptée

Robert Cumming
Robert Cumming le 19 Oct 2014
regexp is very compact and powerful - however it can be a bit slow.
If speed is an issue a simple for loop and strrep can sometimes be faster:
db = { 'NEW' 'May' '(AFP)' 'US' 'prosecutors' 'on' };
pattern = '\(|)';
tic
newdb = regexprep(db, pattern, '');
toc
tic
loopDB = db;
for ii=1:length(db)
loopDB{ii} = strrep ( db{ii}, '(', '' );
loopDB{ii} = strrep ( loopDB{ii}, ')', '' );
end
toc
isequal ( newdb, loopDB )
Elapsed time is 0.002665 seconds.
Elapsed time is 0.000087 seconds.
ans =
1
  1 commentaire
Jan
Jan le 19 Oct 2014
strrep operates on cell strings directly:
loopDB = strrep(db, '(', '');
loopDB = strrep(loopDB, ')', '');

Connectez-vous pour commenter.

Plus de réponses (1)

Alberto
Alberto le 19 Oct 2014
You should use regexprep to replace anything that matches with parenthesis with an empty string; the pattern that matches any parenthesis shoul be:
pattern = '(\(|\))';
Its necessary to scape ( or ) using \( or \). See the examples:
>> texto = '(AFP)';
regexprep(texto, '(\(|\))', '')
ans =
AFP
>> texto = {'(AFP)','(cro'};
regexprep(texto, '(\(|\))', '')
ans =
'AFP' 'cro'
  1 commentaire
Guillaume
Guillaume le 19 Oct 2014
Note that you don't need to surround the alternation with brackets and you don't need to escape the closing bracket, so this simpler pattern would work just as well:
pattern = '\(|)';
newdb = regexprep(db, pattern, '');

Connectez-vous pour commenter.

Catégories

En savoir plus sur Characters and Strings dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by