MATLAB: Is there an alternative for isstrprop to use on non integers

digitguiisstrprop

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?

Best Answer

You can use regexp(), but be careful with exponents
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
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