How to stop figure window from popping up.

I get a figure window popping up when I try to plot two graphs both on same gui window with two y-axes. Can anyone please tell me how can i stop figure window popping up. I am putting complete code below, please have a look. Thankyou for your time in advance.

classdef StaticPad_data < matlab.apps.AppBase

    % Properties that correspond to app components
    properties (Access = public)
        UIFigure          matlab.ui.Figure
        PLOTButtonGroup   matlab.ui.container.ButtonGroup
        TempratureButton  matlab.ui.control.RadioButton
        ThrustButton      matlab.ui.control.RadioButton
        BothButton        matlab.ui.control.RadioButton
        UIAxes            matlab.ui.control.UIAxes
    end

    properties (Access = private)
        Thrust
        Time
        Temprature
    end
    
    methods
       function plotdata(app)
           
           if app.TempratureButton.Value      
               xlabel(app.UIAxes,'Time');
               ylabel(app.UIAxes,'Temprature')
               title(app.UIAxes,'Temprature vs Time')
               plot(app.UIAxes,app.Time,app.Temprature,'o-r');
           elseif app.ThrustButton.Value
               xlabel(app.UIAxes,'Time');
               ylabel(app.UIAxes,'Thrust');
               title(app.UIAxes,'Thrust vs Time');
               plot(app.UIAxes,app.Time,app.Thrust,'*-k');
           elseif app.BothButton.Value
               hold(app.UIAxes,'on')
               yyaxis left
               xlabel(app.UIAxes,'Time');
               ylabel(app.UIAxes,'Temprature');
               plot(app.UIAxes,app.Time,app.Temprature,'o-r');
               
               yyaxis right
               ylabel(app.UIAxes,'Thrust');
               title(app.UIAxes,'Thrust vs Time');
               plot(app.UIAxes,app.Time,app.Thrust);
               legend(app.UIAxes,'Temprature','Thrust','*-k');
               
           end
       end
   end
    

    % Callbacks that handle component events
    methods (Access = private)

        % Code that executes after component creation
        function startupFcn(app)
         all_data = data('all');
         app.Thrust = all_data.thrust;
         app.Temprature = all_data.temprature;
         app.Time = all_data.time;    
         app.plotdata ;
        end

        % Selection changed function: PLOTButtonGroup
        function PLOTButtonGroupSelectionChanged(app, event)
         app.plotdata;   
            
        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.Color = [0.6706 0.8431 0.9686];
            app.UIFigure.Position = [100 100 640 480];
            app.UIFigure.Name = 'MATLAB App';

            % Create PLOTButtonGroup
            app.PLOTButtonGroup = uibuttongroup(app.UIFigure);
            app.PLOTButtonGroup.SelectionChangedFcn = createCallbackFcn(app, @PLOTButtonGroupSelectionChanged, true);
            app.PLOTButtonGroup.Title = 'PLOT';
            app.PLOTButtonGroup.FontWeight = 'bold';
            app.PLOTButtonGroup.FontSize = 13;
            app.PLOTButtonGroup.Position = [531 195 100 93];

            % Create TempratureButton
            app.TempratureButton = uiradiobutton(app.PLOTButtonGroup);
            app.TempratureButton.Text = 'Temprature';
            app.TempratureButton.FontWeight = 'bold';
            app.TempratureButton.FontAngle = 'italic';
            app.TempratureButton.Position = [2 47 87 22];
            app.TempratureButton.Value = true;

            % Create ThrustButton
            app.ThrustButton = uiradiobutton(app.PLOTButtonGroup);
            app.ThrustButton.Text = 'Thrust';
            app.ThrustButton.FontWeight = 'bold';
            app.ThrustButton.FontAngle = 'italic';
            app.ThrustButton.Position = [2 26 65 22];

            % Create BothButton
            app.BothButton = uiradiobutton(app.PLOTButtonGroup);
            app.BothButton.Text = 'Both';
            app.BothButton.FontWeight = 'bold';
            app.BothButton.FontAngle = 'italic';
            app.BothButton.Position = [2 5 65 22];

            % Create UIAxes
            app.UIAxes = uiaxes(app.UIFigure);
            title(app.UIAxes, 'Title')
            xlabel(app.UIAxes, {'X'; ''})
            ylabel(app.UIAxes, 'Y')
            zlabel(app.UIAxes, 'Z')
            app.UIAxes.FontWeight = 'bold';
            app.UIAxes.XGrid = 'on';
            app.UIAxes.YGrid = 'on';
            app.UIAxes.FontSize = 13;
            app.UIAxes.Position = [1 18 489 447];

            % 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 = StaticPad_data

            % 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

[Walter Roberson]

You should plot() first and set labels after that. When an axes does not have "hold on" then plot() will clear the axes, which would remove the labels and titles you just put in.

[Milind Amga]

I tried what you told me but the figure window is still poping up. I want both graphs to be plotted in the gui window. How can I do that?

Answer 1

[Sivani Pentapati]

Hi Milind,

You are getting the second plot in the new figure because yyaxis adds second yaxis to the active axis. I assume a new axis is being created in the above case and hence the new figure. To ensure that the new axes are added to the UIAxes of App Designer, change the call to yyaxis into the below code where app.UIAxes are explicity mentioned for the axes.

elseif app.BothButton.Value
   hold(app.UIAxes,'on')
   yyaxis(app.UIAxes,'left');
   xlabel(app.UIAxes,'Time');
   ylabel(app.UIAxes,'Temprature');
   plot(app.UIAxes,app.Time,app.Temprature,'o-r');
   
   yyaxis(app.UIAxes,'right');
   ylabel(app.UIAxes,'Thrust');
   title(app.UIAxes,'Thrust vs Time');
   plot(app.UIAxes,app.Time,app.Thrust);
   legend(app.UIAxes,'Temprature','Thrust','*-k');
end