how I can know if a string is empty or not!?
89 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
please help me with a code ! thank you !
0 Commenti
Risposta accettata
Guillaume
il 15 Mag 2016
Modificato: Guillaume
il 15 Mag 2016
>>isempty('aaa')
ans =
0
>>isempty('')
ans =
1
Note that because strings are just matrices (of characters), it's the same test you use for matrix emptiness.
4 Commenti
Adam Danz
il 7 Mag 2020
Modificato: Adam Danz
il 7 Mag 2020
For strings or char arrays, you can use,
TF = strlength(s)==0; % r2016b or later
Demo
strlength('word') % ans = 4
strlength("word") % ans = 4
strlength("") % ans = 0
strlength('') % ans = 0
If the string is scalar,
isempty(char(s))
Demo
s = "";
isempty(char(s)) % ans = 1
Stephen23
il 8 Mag 2020
Modificato: Stephen23
il 8 Mag 2020
"" is not an empty string array, it is a scalar string array (which happens to have zero characters, but the number of characters is totally irrelevant to the size of the string array):
>> isscalar("aaaaaaaaa")
ans=
1
>> isscalar("")
ans=
1
If you want to know how many characters are in the elements of a string array, use strlength:
Più risposte (1)
Weird Rando
il 15 Mag 2016
Modificato: Weird Rando
il 15 Mag 2016
You can use the length()
a = '';
stringlen = length(a) % stringlen = 0
Vedere anche
Categorie
Scopri di più su Cell Arrays in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!