Ndtyjky

I am trying to collect several values inputted into NumericEditField controls by a user and store them in order to use them later in a computation, whose result gets presented back.

I seem to be able to store the variables, but am unable to access them later. Each of the variables is considered private because that is where it is having me add the callbacks. I have tried adding all of the variables in a public portion near the beginning, but that did not work.

Here is the code:

classdef Finalscalc < matlab.apps.AppBase



    % Properties that correspond to app components

    properties (Access = public)

        UIFigure                       matlab.ui.Figure

        PleaseenteryourcurrentgradeEditFieldLabel  matlab.ui.control.Label

        PleaseenteryourcurrentgradeEditField  matlab.ui.control.NumericEditField

        PleaseenterthegradeyouwantEditFieldLabel  matlab.ui.control.Label

        PleaseenterthegradeyouwantEditField  matlab.ui.control.NumericEditField

        PleaseentertheweightofthefinalexamEditFieldLabel  matlab.ui.control.Label

        PleaseentertheweightofthefinalexamEditField  matlab.ui.control.NumericEditField

        Label                          matlab.ui.control.Label

        Label_2                        matlab.ui.control.Label

        Label_3                        matlab.ui.control.Label

        YouneedatleastaEditFieldLabel  matlab.ui.control.Label

        YouneedatleastaEditField       matlab.ui.control.NumericEditField

        Label_4                        matlab.ui.control.Label

        togetaEditFieldLabel           matlab.ui.control.Label

        togetaEditField                matlab.ui.control.NumericEditField

        Label_5                        matlab.ui.control.Label

        CalcualteButton                matlab.ui.control.Button

        GoodLuckLabel                  matlab.ui.control.Label

    end







    methods (Access = private)



        % Code that executes after component creation

        function startupFcn(app)



        end



        % Value changed function: PleaseenteryourcurrentgradeEditField

        function PleaseenteryourcurrentgradeEditFieldValueChanged(app, event)

            app.current = app.PleaseenteryourcurrentgradeEditField.Value;

            current = app.current;

            app.current = current;

        end



        % Value changed function: PleaseenterthegradeyouwantEditField

        function PleaseenterthegradeyouwantEditFieldValueChanged(app, event)

            app.want = app.PleaseenterthegradeyouwantEditField.Value;

            want = app.want;

            app.want = want;

        end



        % Value changed function: 

        % PleaseentertheweightofthefinalexamEditField

        function PleaseentertheweightofthefinalexamEditFieldValueChanged(app, event)

            app.weight = app.PleaseentertheweightofthefinalexamEditField.Value;

            weight = app.weight;

            app.weight = weight;

        end



        % Button pushed function: CalcualteButton

        function CalcualteButtonPushed(app, event)

            grade = ((100 * app.want)-(100 - app.weight) * app.current) / app.weight;

            grade = app.grade;

            app.grade = grade;

        end



        % Value changed function: YouneedatleastaEditField

        function YouneedatleastaEditFieldValueChanged(app, event)

            grade = app.YouneedatleastaEditField.Value;

            fprintf('%,2f', grade); 

        end



        % Value changed function: togetaEditField

        function togetaEditFieldValueChanged(app, event)

            app.PleaseenterthegradeyouwantEditField.Value = app.togetaEditField.Value;



        end

    end



    % App initialization and construction

    methods (Access = private)



        % Create UIFigure and components

        function createComponents(app)



            % Create UIFigure

            app.UIFigure = uifigure;

            app.UIFigure.Position = [100 100 640 480];

            app.UIFigure.Name = 'UI Figure';



            % Create PleaseenteryourcurrentgradeEditFieldLabel

            app.PleaseenteryourcurrentgradeEditFieldLabel = uilabel(app.UIFigure);

            app.PleaseenteryourcurrentgradeEditFieldLabel.HorizontalAlignment = 'right';

            app.PleaseenteryourcurrentgradeEditFieldLabel.Position = [117 337 174 22];

            app.PleaseenteryourcurrentgradeEditFieldLabel.Text = 'Please enter your current grade';



            % Create PleaseenteryourcurrentgradeEditField

            app.PleaseenteryourcurrentgradeEditField = uieditfield(app.UIFigure, 'numeric');

            app.PleaseenteryourcurrentgradeEditField.ValueChangedFcn = createCallbackFcn(app, @PleaseenteryourcurrentgradeEditFieldValueChanged, true);

            app.PleaseenteryourcurrentgradeEditField.Position = [306 337 100 22];



            % Create PleaseenterthegradeyouwantEditFieldLabel

            app.PleaseenterthegradeyouwantEditFieldLabel = uilabel(app.UIFigure);

            app.PleaseenterthegradeyouwantEditFieldLabel.HorizontalAlignment = 'right';

            app.PleaseenterthegradeyouwantEditFieldLabel.Position = [116 289 178 22];

            app.PleaseenterthegradeyouwantEditFieldLabel.Text = 'Please enter the grade you want';



            % Create PleaseenterthegradeyouwantEditField

            app.PleaseenterthegradeyouwantEditField = uieditfield(app.UIFigure, 'numeric');

            app.PleaseenterthegradeyouwantEditField.ValueChangedFcn = createCallbackFcn(app, @PleaseenterthegradeyouwantEditFieldValueChanged, true);

            app.PleaseenterthegradeyouwantEditField.Position = [309 289 100 22];



            % Create PleaseentertheweightofthefinalexamEditFieldLabel

            app.PleaseentertheweightofthefinalexamEditFieldLabel = uilabel(app.UIFigure);

            app.PleaseentertheweightofthefinalexamEditFieldLabel.HorizontalAlignment = 'right';

            app.PleaseentertheweightofthefinalexamEditFieldLabel.Position = [70 248 224 22];

            app.PleaseentertheweightofthefinalexamEditFieldLabel.Text = 'Please enter the weight of the final exam';



            % Create PleaseentertheweightofthefinalexamEditField

            app.PleaseentertheweightofthefinalexamEditField = uieditfield(app.UIFigure, 'numeric');

            app.PleaseentertheweightofthefinalexamEditField.ValueChangedFcn = createCallbackFcn(app, @PleaseentertheweightofthefinalexamEditFieldValueChanged, true);

            app.PleaseentertheweightofthefinalexamEditField.Position = [309 248 100 22];



            % Create Label

            app.Label = uilabel(app.UIFigure);

            app.Label.Position = [417 337 25 22];

            app.Label.Text = '%';



            % Create Label_2

            app.Label_2 = uilabel(app.UIFigure);

            app.Label_2.Position = [417 289 25 22];

            app.Label_2.Text = '%';



            % Create Label_3

            app.Label_3 = uilabel(app.UIFigure);

            app.Label_3.Position = [417 248 25 22];

            app.Label_3.Text = '%';



            % Create YouneedatleastaEditFieldLabel

            app.YouneedatleastaEditFieldLabel = uilabel(app.UIFigure);

            app.YouneedatleastaEditFieldLabel.HorizontalAlignment = 'right';

            app.YouneedatleastaEditFieldLabel.Position = [177 105 107 22];

            app.YouneedatleastaEditFieldLabel.Text = 'You need at least a';



            % Create YouneedatleastaEditField

            app.YouneedatleastaEditField = uieditfield(app.UIFigure, 'numeric');

            app.YouneedatleastaEditField.ValueChangedFcn = createCallbackFcn(app, @YouneedatleastaEditFieldValueChanged, true);

            app.YouneedatleastaEditField.Position = [291 105 19 22];



            % Create Label_4

            app.Label_4 = uilabel(app.UIFigure);

            app.Label_4.Position = [323 105 25 22];

            app.Label_4.Text = '%';



            % Create togetaEditFieldLabel

            app.togetaEditFieldLabel = uilabel(app.UIFigure);

            app.togetaEditFieldLabel.HorizontalAlignment = 'right';

            app.togetaEditFieldLabel.Position = [337 105 46 22];

            app.togetaEditFieldLabel.Text = 'to get a';



            % Create togetaEditField

            app.togetaEditField = uieditfield(app.UIFigure, 'numeric');

            app.togetaEditField.ValueChangedFcn = createCallbackFcn(app, @togetaEditFieldValueChanged, true);

            app.togetaEditField.Position = [390 105 16 22];



            % Create Label_5

            app.Label_5 = uilabel(app.UIFigure);

            app.Label_5.Position = [417 105 25 22];

            app.Label_5.Text = '%';



            % Create CalcualteButton

            app.CalcualteButton = uibutton(app.UIFigure, 'push');

            app.CalcualteButton.ButtonPushedFcn = createCallbackFcn(app, @CalcualteButtonPushed, true);

            app.CalcualteButton.Position = [271 168 100 22];

            app.CalcualteButton.Text = 'Calcualte';



            % Create GoodLuckLabel

            app.GoodLuckLabel = uilabel(app.UIFigure);

            app.GoodLuckLabel.Position = [287 30 70 22];

            app.GoodLuckLabel.Text = 'Good Luck !';

        end

    end



    methods (Access = public)



        % Construct app

        function app = Finalscalc



            % Create and configure components

            createComponents(app)



            % Register the app with App Designer

            registerApp(app, app.UIFigure)



            % Execute the startup function

            runStartupFcn(app, @startupFcn)



            if nargout == 0

                clear app

            end

        end



        % Code that executes before app deletion

        function delete(app)



            % Delete UIFigure when app is deleted

            delete(app.UIFigure)

        end

    end

end

Instead of using the ...ValueChanged functions all you need to do is access the Value field of the various controls from which you want to get values. Replace the current private methods block you have with this:

methods (Access = private)



    % Button pushed function: CalcualteButton

    function CalcualteButtonPushed(app, ~)

      % Get values from edit fields:

        want = app.PleaseenterthegradeyouwantEditField.Value;

        weight = app.PleaseentertheweightofthefinalexamEditField.Value;

        current = app.PleaseenteryourcurrentgradeEditField.Value;          

      % Perform computation:

        needed = ( (100 * want) - (100 - weight) * current) / weight;

      % Write values to new edit fields:  

        app.YouneedatleastaEditField.Value = needed;

        app.togetaEditField.Value = want;

    end



end

In my humble opinion, TMW greatly managed to simplify the access of values from text fields in the new UIFigure system - from here it's just a matter of understanding how it works.