Simple menu selection plot dependent on radio button selection (App designer)

Hello,

I am trying to design a simple app on app designer with 3 components, a UI axes, a drop down menu, and radio buttons. The drop down menu has two options to select from as a starting place, the user would then have to choose one of two options from the drop down menu in order to display the corresponding plot (total 4 plots for each case):

Plots:

1) Periodic & pretty plot (x1,y1)

2) Periodic & not pretty plot (x4,y4)

3) Non periodic & not pretty plot (x2,y2)

4) Non periodic & pretty plot ( x3,y3)

My attempt at this is to first read the table from the excel file I have, and then use switch/case statements along with if else conditions as follows:

classdef Simple_App_Test < matlab.apps.AppBase
    % Properties that correspond to app components
    properties (Access = public)
        UIFigure             matlab.ui.Figure
        UIAxes               matlab.ui.control.UIAxes
        BeautyDropDownLabel  matlab.ui.control.Label
        BeautyDropDown       matlab.ui.control.DropDown
        DataTypeButtonGroup  matlab.ui.container.ButtonGroup
        PeriodicButton       matlab.ui.control.RadioButton
        NonperiodicButton    matlab.ui.control.RadioButton
    end
    % Callbacks that handle component events
    methods (Access = private)
        % Code that executes after component creation
        function startupFcn(app)
            dataset = readtable('App_test.xlsx');
            x1 = dataset(:,1);
            x2 = dataset(:,3);
            x3 = dataset(:,5);
            x4 = dataset(:,7);
            y1 = dataset(:,2);
            y2 = dataset(:,4);
            y3 = dataset(:,6);
            y4 = dataset(:,8);
        end
        % Selection changed function: DataTypeButtonGroup
        function DataTypeButtonGroupSelectionChanged(app, event)
            selectedButton = app.DataTypeButtonGroup.SelectedObject;
            value = app.DataTypeButtonGroup.Value;
            switch value
                case "Periodic"
                    if app.BeautyDropDown.Value == 'Pretty'
                        plot(app.UIAxes,x1,y1);
                    else
                        plot(app.UIAxes,x4,y4);
                    end
                case "Non periodic"     
                    if app.BeautyDropDown.Value == 'Not Pretty'
                        plot(app.UIAxes,x2,y2);
                    else
                        plot(app.UIAxes,x3,y3);
                    end
                    end
        end
        % Value changed function: BeautyDropDown
        function BeautyDropDownValueChanged(app, event)
            value = app.BeautyDropDown.Value;
  
        end
    end
    % Component initialization
    methods (Access = private)
        % Create UIFigure and components
        function createComponents(app)
            % Create UIFigure and hide until all components are created
            app.UIFigure = uifigure('Visible', 'off');
            app.UIFigure.Position = [100 100 640 480];
            app.UIFigure.Name = 'MATLAB App';
            % Create UIAxes
            app.UIAxes = uiaxes(app.UIFigure);
            title(app.UIAxes, 'Title')
            xlabel(app.UIAxes, 'X')
            ylabel(app.UIAxes, 'Y')
            app.UIAxes.Position = [90 159 450 291];
            % Create BeautyDropDownLabel
            app.BeautyDropDownLabel = uilabel(app.UIFigure);
            app.BeautyDropDownLabel.HorizontalAlignment = 'right';
            app.BeautyDropDownLabel.Position = [353 71 43 22];
            app.BeautyDropDownLabel.Text = 'Beauty';
            % Create BeautyDropDown
            app.BeautyDropDown = uidropdown(app.UIFigure);
            app.BeautyDropDown.Items = {'Pretty', 'Not Pretty'};
            app.BeautyDropDown.ValueChangedFcn = createCallbackFcn(app, @BeautyDropDownValueChanged, true);
            app.BeautyDropDown.Position = [411 71 100 22];
            app.BeautyDropDown.Value = 'Not Pretty';
            % Create DataTypeButtonGroup
            app.DataTypeButtonGroup = uibuttongroup(app.UIFigure);
            app.DataTypeButtonGroup.SelectionChangedFcn = createCallbackFcn(app, @DataTypeButtonGroupSelectionChanged, true);
            app.DataTypeButtonGroup.Title = 'Data Type';
            app.DataTypeButtonGroup.Position = [120 29 123 106];
            % Create PeriodicButton
            app.PeriodicButton = uiradiobutton(app.DataTypeButtonGroup);
            app.PeriodicButton.Text = 'Periodic';
            app.PeriodicButton.Position = [11 60 65 22];
            app.PeriodicButton.Value = true;
            % Create NonperiodicButton
            app.NonperiodicButton = uiradiobutton(app.DataTypeButtonGroup);
            app.NonperiodicButton.Text = 'Non periodic';
            app.NonperiodicButton.Position = [11 38 89 22];
            % Show the figure after all components are created
            app.UIFigure.Visible = 'on';
        end
    end
    % App creation and deletion
    methods (Access = public)
        % Construct app
        function app = Simple_App_Test
            % Create UIFigure and 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

Here is a screen shot of the design view:

I tried running the app but nothing gets plotted on the axis no matter what selection I make... I would really appreciate any guidence on this.