Hi, everyone! I got an error while runnig this code . ""Error setting property 'AlturaactualEditField' of class 'app2': Cannot convert double value 3.79215 to a handle "

Im trying to show on a EitField in AppDesigner values capture by a ultrasonic sensor in real time. I've al ready plotted in real time in axes, but when i try to show those values on a editField i got this error : "Error setting property 'AlturaactualEditField' of class 'app2':

Cannot convert double value 3.79215 to a handle"

Heres the code:

properties (Access = private)
        ComunicacionSerial % Description
        
    end


    methods (Access = private)

        % Code that executes after component creation
        function startupFcn(app)
            app.ComunicacionSerial=serial('COM3','BaudRate',9600,'Terminator','CR/LF');
            app.ConectLamp.Color='red';
            app.desconectLamp.Color='red';
        end

        % Button pushed function: ConectarButton
        function ConectarButtonPushed(app, event)
            
         
            app.ConectLamp.Color='green'; 
            fopen(app.ComunicacionSerial); 
            matv=zeros(1,100); 
            math=zeros(1,100); 
            for cont=1:1:3000
                sen=str2double(fscanf(app.ComunicacionSerial)); 
                matv(cont)= sen(1)*5/1024; 
                math(cont)=(400*matv(cont)/58.2);
                plot(app.UIAxes2,matv);
                plot(app.UIAxes,math);
                drawnow;
                app.AlturaactualEditField= math(cont); %%Here´s the line where i got that error message
            end
            
        end

        % Button pushed function: DesconectarButton
        function DesconectarButtonPushed(app, event)
            app.ConectLamp.Color='red'
            app.desconectLamp.Color='green'
            fclose(app.ComunicacionSerial);
            clear all;
        end

        % Close request function: UIFigure
        function UIFigureCloseRequest(app, event)
            delete(app);
            fclose(app.ComunicacionSerial);
            delete(app.ComunicacionSerial);
        end
    end

Answer 1

[Mohammad Sami]

You need to assign it to the value of editfield rather then the edit field itself

app.AlturaactualEditField.Value = math(cont);
% or convert to string if its a text edit field
app.AlturaactualEditField.Value = string(math(cont));

[Pablo Manuel Torres Hernandez]

Thanks! I´ve already paste what you said :

app.AlturaactualEditField.Value = string(math(cont));

but now , theres another error message:

Error using matlab.ui.control.internal.model.AbstractNumericComponent/set.Value (line 104)

'Value' must be numeric, such as 10.

[Mohammad Sami]

This means that you are using a numeric edit field. Therefore you do not require to convert your value to string first. You can directly assign the double variable to a numeric edit field.

app.AlturaactualEditField.Value = math(cont);

[Pablo Manuel Torres Hernandez]

You were rigth , thank you so much !!!!