Not getting Error message
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I am trying to get an error message if my a value is left empty by user. But i am not getting the same. If someone can help.My code is as follows.
function Run_Callback(hObject, eventdata, handles)
% hObject handle to Run (see GCBO)
% eventdata reserved - to be defined in edit1 future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
a=str2double(get(handles.edit1,'string'));
b=str2double(get(handles.edit2,'string'));
c=str2double(get(handles.edit3,'string'));
d=str2double(get(handles.edit4,'string'));
e=str2double(get(handles.edit5,'string'));
f=str2double(get(handles.edit6,'string'));
g=str2double(get(handles.edit7,'string'));
h = a *((b/c)*(d/e)^2*(f/g))^(1/5);
if isempty(a)
errordlg('Please enter value ofDreference','Error Code I');
else
set(handles.edit8,'string',num2str(h));
end
0 commentaires
Réponses (1)
Walter Roberson
le 23 Sep 2021
AnEmptyString = '';
str2double(AnEmptyString)
When you str2double() something empty, you get NaN, not empty. You need to check the result of the get() if you want to distinguish between the user entering nothing, or the user entering 'NaN', or the user entering something that is not number-like.
0 commentaires
Voir également
Catégories
En savoir plus sur Argument Definitions 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!