Right now, changing the spinner's value will create a new maze, but the mazes are still 10-by-10. Try running the app to verify this behavior. To fix this, you can use the gr

n the callback function, get the spinner's value and call the amaze function with the spinner's value as an input.

 % Properties that correspond to app components
    properties (Access = public)
        UIFigure              matlab.ui.Figure
        GridSizeSpinner       matlab.ui.control.Spinner
        GridSizeSpinnerLabel  matlab.ui.control.Label
        NewMazeButton         matlab.ui.control.Button
        UIAxes                matlab.ui.control.UIAxes
    end

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

        % Callback function: GridSizeSpinner, NewMazeButton
        function NewMazeButtonPushed(app, event)
            [wall,wx,wy] = amaze();
            plot(app.UIAxes,wall,"XData",wx,"YData",wy,"NodeLabel",[])
            axis(app.UIAxes,"equal")
        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 = [100 100 321 254];
            app.UIFigure.Name = 'MATLAB App';

            % Create UIAxes
            app.UIAxes = uiaxes(app.UIFigure);
            title(app.UIAxes, 'Maze')
            app.UIAxes.XTick = [];
            app.UIAxes.XTickLabel = '';
            app.UIAxes.YTick = [];
            app.UIAxes.YTickLabel = '';
            app.UIAxes.Box = 'on';
            app.UIAxes.Position = [63 57 200 185];

            % Create NewMazeButton
            app.NewMazeButton = uibutton(app.UIFigure, 'push');
            app.NewMazeButton.ButtonPushedFcn = createCallbackFcn(app, @NewMazeButtonPushed, true);
            app.NewMazeButton.Position = [205 23 100 23];
            app.NewMazeButton.Text = 'New Maze';

            % Create GridSizeSpinnerLabel
            app.GridSizeSpinnerLabel = uilabel(app.UIFigure);
            app.GridSizeSpinnerLabel.HorizontalAlignment = 'right';
            app.GridSizeSpinnerLabel.Position = [4 23 54 22];
            app.GridSizeSpinnerLabel.Text = 'Grid Size';

            % Create GridSizeSpinner
            app.GridSizeSpinner = uispinner(app.UIFigure);
            app.GridSizeSpinner.Step = 5;
            app.GridSizeSpinner.Limits = [5 30];
            app.GridSizeSpinner.ValueChangedFcn = createCallbackFcn(app, @NewMazeButtonPushed, true);
            app.GridSizeSpinner.Position = [73 23 100 22];
            app.GridSizeSpinner.Value = 5;

            % 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 = myapp

            % Create UIFigure and components
            createComponents(app)

            % Register the app with App Designer
            registerApp(app, app.UIFigure)

            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

[Steven Lord]

This sounds like a homework assignment. If it is, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.

If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the free MATLAB Onramp tutorial to quickly learn the essentials of MATLAB.

If you aren't sure where to start because you're not familiar with the mathematics you'll need to solve the problem, I recommend asking your professor and/or teaching assistant for help.

Answer 1

[Voss]

% Callback function: GridSizeSpinner, NewMazeButton
function NewMazeButtonPushed(app, event)
    % get the spinner's value:
    val = app.GridSizeSpinner.Value;
    % call the amaze function with the spinner's value as an input:
    [wall,wx,wy] = amaze(val);
    plot(app.UIAxes,wall,"XData",wx,"YData",wy,"NodeLabel",[])
    axis(app.UIAxes,"equal")
end