Is there an alternative for isstrprop to use on non integers?
1 次查看(过去 30 天)
显示 更早的评论
I've set up a GUI (without Guide) that first one must input parameters, and then a plot will show data. Problem is, I'm trying to find a way to check the parameters before I allow the UI to run. These parameters must be real numbers greater than 0. Using the isstrprop command works fine for positive integers, but it doesn't work when say I want to input a parameter for example 0.5 Hz.
Inside a button callback, I've inserted the following code:
try
if isstrprop(paedit.String,'digit')==1 && isstrprop(rtedit.String,'digit')==1 && isstrprop(siedit.String,'digit')==1
% accept parameters and display run button
accbtn.Visible='off';
accbtn.Enable='off';
runbtn.Visible='on';
stopbtn.Visible='on';
runbtn.Enable='on';
rtedit.Enable='off';
paedit.Enable='off';
siedit.Enable='off';
else
msgbox('Please enter a valid parameters','Input Error','error','modal');
end
catch
msgbox('Please enter a valid parameters','Input Error','error','modal');
end
This code makes sure that if a letter or a negative value is entered into one of the parameter edit boxes, it will not continue. It doesn't, however, let me do non integers. Is there a way to get around that with isstrprop or another command?
0 个评论
采纳的回答
Walter Roberson
2015-12-14
Really the easiest way is to use
tmp = str2double(paedit.String);
if ~isnan(tmp)
% accept parameters and display run button
accbtn.Visible='off';
accbtn.Enable='off';
runbtn.Visible='on';
stopbtn.Visible='on';
runbtn.Enable='on';
rtedit.Enable='off';
paedit.Enable='off';
siedit.Enable='off';
else
msgbox('Please enter a valid parameters','Input Error','error','modal');
end
No try/catch should be needed
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Environment and Settings 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!