帮我写一段MATLAB appdesigner中在UIAxes上的图片用鼠标来画点连线的代码

好的，以下是一个简单的MATLAB App Designer的代码，可以在UIAxes上用鼠标画点连线：

classdef MyApp < matlab.apps.AppBase

    % Properties that correspond to app components
    properties (Access = public)
        UIFigure   matlab.ui.Figure
        UIAxes     matlab.ui.control.UIAxes
    end

    % Properties that are hidden from App Designer
    properties (Hidden)
        LineHandle   matlab.graphics.chart.primitive.Line
        Points       double
        Count        double
    end

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

        % Button down function: UIAxes
        function UIAxesButtonDown(app, event)
            % Get the current point
            currentPoint = app.UIAxes.CurrentPoint(1, 1:2);
            % Add the current point to the points array
            app.Points(app.Count, :) = currentPoint;
            % Update the count
            app.Count = app.Count + 1;
            % Update the line
            if app.Count > 1
                app.LineHandle.XData = app.Points(:, 1);
                app.LineHandle.YData = app.Points(:, 2);
            end
            % Draw a circle at the current point
            plot(app.UIAxes, currentPoint(1), currentPoint(2), 'o', 'MarkerSize', 8, 'LineWidth', 1);
        end

    end

    % App initialization and construction
    methods (Access = private)

        % Create UIFigure and components
        function createComponents(app)
            % Create UIFigure and configure properties
            app.UIFigure = uifigure('Name', 'My App');
            app.UIFigure.Position = [100 100 640 480];

            % Create UIAxes
            app.UIAxes = uiaxes(app.UIFigure);
            title(app.UIAxes, 'Click and drag to draw a line')
            xlabel(app.UIAxes, 'X')
            ylabel(app.UIAxes, 'Y')
            app.UIAxes.Position = [20 20 600 400];
            hold(app.UIAxes, 'on');
            app.UIAxes.ButtonDownFcn = createCallbackFcn(app, @UIAxesButtonDown, true);

            % Create an empty line object for drawing points
            app.LineHandle = plot(app.UIAxes, nan, nan, 'LineWidth', 2, 'Color', 'black');

            % Initialize the points array and count
            app.Points = zeros(100, 2);
            app.Count = 1;
        end
    end

    % App creation and deletion
    methods (Access = public)

        % Construct app
        function app = MyApp
            % Create UIFigure and components
            createComponents(app)
        end

        % Code that executes before app deletion
        function delete(app)

            % Delete UIFigure when app is deleted
            delete(app.UIFigure)
        end
    end
end

这个代码将创建一个简单的App Designer应用程序，它将在UIAxes上启用鼠标点击和拖动，以便用户可以绘制线条。该应用程序将维护一个点数组，每次用户单击或拖动鼠标时将当前点添加到该数组中。应用程序还将维护一个计数器，以跟踪添加到数组中的点数。

当用户单击或拖动鼠标时，UIAxesButtonDown回调将被调用。此回调将获取当前点的坐标，将其添加到Points数组中，并在UIAxes上绘制一个圆形表示该点。如果Points数组中有两个或更多点，回调将更新LineHandle对象的XData和YData属性，以便在UIAxes上绘制线条。