having error on string for showing data on the app ui

            featuresTest = vertcat(featuresTest{:});
            featuresTest = rmmissing(featuresTest);
            featuresTest{:,2:15} = (featuresTest{:,2:15}-app.mn)./app.sd;
            resulttable= app.HelperTestKNNClassifier(app.trainedClassifier, featuresTest);
            app.MatchingPercentageEditField.Value=string(resulttable.ConfidencePercentage);
            
            if str2double(string(resulttable.ConfidencePercentage))>70
                app.StatusEditField.Value = "person authorized";
                app.SpeakerIdentityEditField.Value=string(resulttable.PredictedSpeaker);
                if string(resulttable.PredictedSpeaker) == "Jens_Stoltenberg"
                   
                elseif string(resulttable.PredictedSpeaker) == "Julia_Gillard"
                    
                elseif string(resulttable.PredictedSpeaker) == "Magaret_Tarcher"
                 
                elseif string(resulttable.PredictedSpeaker) == "Nelson_Mandela"
          
                    
                    

so whenever i run this code for my speech processing, I will have a problem showing the error "Error using matlab.ui.control.EditField/set.Value (line 99)

'Value' must be a character vector or a string scalar. "

on the line app.MatchingPercentageEditField.Value=string(resulttable.ConfidencePercentage);

any guru here that can help me, thanks !

Answer 1

[dpb]

Per <uieditfield> documentation,

Value — Text in edit field

'' (default) | character vector | string scalar

Text in the edit field, specified as a character vector or string scalar. MATLAB® displays the text as a single line. If you want to allow multiple lines of text, use a text area component instead of an edit field.

Your .ConfidencePercentage table variable is a vector of values, not a single value.

Do you really want the user to be able to modify these or just display them? Either way, the uieditfield component can't display but a single string.

[Kiat Tsen Lim]

Hi, thanks for the reply, i just wanna display the result for the user, so is better for me to change the edit field to a text area component? or there is a better way

[dpb]

Possibly uitable; you can get the titles and all for free that way, too.

[Kiat Tsen Lim]

so if I use a text area component, do i still need to put string before (resulttable.confidencepercentage)?

For example:

app.MatchingPercentageEditField.Value=string(resulttable.ConfidencePercentage);

[dpb]

The .Value property is text, yes...but the uitable can handle the table directly with variable names, etc., etc., ... Don't know your application, of course, but from afar would seem to be a good choice