Using Matlab App Designer, error using drop down list. Incompatible array sizes.
3 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Im atttempting to use a drop down list to select a country, which will pull information from a website and populate an Edit Field(text). The code works for the first two countries, when I use the third I get an incompatible array size error.
data = webread('https://restcountries.com/v3.1/all');
data = webread('https://restcountries.com/v3.1/all');
app.Country_Select.Value = 'Niger';
if app.Country_Select.Value == 'Jordan'
app.SpokenLanguageEditField.Value = data{1,1}.languages;
elseif app.Country_Select.Value == 'Brazil'
app.SpokenLanguageEditField.Value = data{2,1}.languages;
else app.Country_Select.Value == 'Niger'
app.SpokenLanguageEditField.Value = data{9,1}.languages;
end
app.SpokenLanguageEditField.Value
0 Commenti
Risposta accettata
Voss
il 17 Lug 2023
Instead of using == to compare character vectors, use strcmp.
val = app.Country_Select.Value;
if strcmp(val,'Jordan')
idx = 1;
elseif strcmp(val,'Brazil')
idx = 2;
else
idx = 9;
end
app.SpokenLanguageEditField.Value = data{idx,1}.languages;
== compares element-by-element, i.e., character-by-character in this case since you're comparing character vectors, so the number of elements must be the same, i.e., the character vectors must be the same length. If the character vectors are not the same length, as in 'Niger' == 'Jordan', you'll get the error you got.
You could also use switch/case.
val = app.Country_Select.Value;
switch val
case 'Jordan'
idx = 1;
case 'Brazil'
idx = 2;
otherwise
idx = 9;
end
app.SpokenLanguageEditField.Value = data{idx,1}.languages;
5 Commenti
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Environment and Settings 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!