build an app with 2 buttons labelled a and b in matlab

To build an app with 2 buttons labelled "a" and "b" in Matlab, follow the steps below:

First, create a new app using the App Designer in Matlab.
Drag and drop two "Button" components onto the app canvas.
Change the "Text" property of the first button to "a" and the second button to "b"
Double click on the first button to create a callback function for it.
In the callback function, add the following code to display a message when the "a" button is clicked:


main.m
function ButtonaCallback(app, event)
    % Display message
    uialert(app.UIFigure, 'Button a was clicked!', 'Message');
end
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Repeat step 4 and 5 for the second button, with different messages:


main.m
function ButtonbCallback(app, event)
    % Display message
    uialert(app.UIFigure, 'Button b was clicked!', 'Message');
end
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5 lines

Run the app and click on the buttons to test if the messages are displayed correctly.

Your final code in the app designer should look something like this:


main.m
classdef MyApp < matlab.apps.AppBase

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

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

        % Button a callback
        function ButtonaCallback(app, event)
            % Display message
            uialert(app.UIFigure, 'Button a was clicked!', 'Message');
        end

        % Button b callback
        function ButtonbCallback(app, event)
            % Display message
            uialert(app.UIFigure, 'Button b was clicked!', 'Message');
        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', 'Position', [100 100 640 480]);

            % Create Buttona
            app.Buttona = uibutton(app.UIFigure, 'push', ...
                'Position', [180 215 100 22], ...
                'Text', 'a', ...
                'ButtonPushedFcn', createCallbackFcn(app, @ButtonaCallback, true));

            % Create Buttonb
            app.Buttonb = uibutton(app.UIFigure, 'push', ...
                'Position', [370 215 100 22], ...
                'Text', 'b', ...
                'ButtonPushedFcn', createCallbackFcn(app, @ButtonbCallback, true));
        end
    end

    % App startup and close
    methods (Access = public)

        % Start the app
        function start(app)
            % Create all components
            createComponents(app)

            % Show the figure
            app.UIFigure.Visible = 'on';
        end
    end
end

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Note: This code was generated by the Matlab App Designer tool, which simplifies the process of creating user interfaces for Matlab apps.

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