利用MATLAB设计虚拟多功能信号发生器的GUI，能够实现： ①信号源为2路； ②每路信号源的信号类型可通过按键或波段开关进行选择，信号类型包括方波、正弦波、三角波、锯齿波；

好的，我可以帮你设计这个GUI。首先，你需要创建一个新的MATLAB GUI窗口。在窗口中，你需要添加两个信号源选择按钮、四个波形类型选择按钮、一个频率输入框和一个开始按钮。以下是实现该GUI的代码示例：

function varargout = signal_generator_GUI(varargin)
% 信号发生器GUI

% 1. 创建GUI窗口和控件
fig = figure('Visible','off','Position',[360,500,450,285]);
btn_start = uicontrol('Style','pushbutton','String','开始','Position',[315,220,70,25],'Callback',@btn_start_callback);
edit_freq = uicontrol('Style','edit','String','1000','Position',[90,220,100,25],'Callback',@edit_freq_callback);
text_freq = uicontrol('Style','text','String','频率(Hz)','Position',[20,220,60,20]);
btn_signal1 = uicontrol('Style','togglebutton','String','信号源1','Position',[20,180,80,25],'Callback',@btn_signal1_callback);
btn_signal2 = uicontrol('Style','togglebutton','String','信号源2','Position',[125,180,80,25],'Callback',@btn_signal2_callback);
btn_square = uicontrol('Style','togglebutton','String','方波','Position',[20,130,80,25],'Callback',@btn_square_callback);
btn_sine = uicontrol('Style','togglebutton','String','正弦波','Position',[125,130,80,25],'Callback',@btn_sine_callback);
btn_triangle = uicontrol('Style','togglebutton','String','三角波','Position',[230,130,80,25],'Callback',@btn_triangle_callback);
btn_sawtooth = uicontrol('Style','togglebutton','String','锯齿波','Position',[335,130,80,25],'Callback',@btn_sawtooth_callback]);

% 2. 初始化变量
signal1_on = 1;
signal2_on = 0;
square_on = 1;
sine_on = 0;
triangle_on = 0;
sawtooth_on = 0;

% 3. 显示窗口
set(fig,'Visible','on');

% 4. 回调函数
    function btn_start_callback(~,~)
        freq = str2double(get(edit_freq,'String'));
        if signal1_on
            signal = generate_signal(freq,square_on,sine_on,triangle_on,sawtooth_on);
            % 发送信号到信号源1
        end
        if signal2_on
            signal = generate_signal(freq,square_on,sine_on,triangle_on,sawtooth_on);
            % 发送信号到信号源2
        end
    end

    function edit_freq_callback(~,~)
        % 更新频率
    end

    function btn_signal1_callback(hObject,~)
        if get(hObject,'Value') == 1
            signal1_on = 1;
            signal2_on = 0;
            set(btn_signal2,'Value',0);
        else
            signal1_on = 0;
            set(hObject,'Value',1);
        end
    end

    function btn_signal2_callback(hObject,~)
        if get(hObject,'Value') == 1
            signal2_on = 1;
            signal1_on = 0;
            set(btn_signal1,'Value',0);
        else
            signal2_on = 0;
            set(hObject,'Value',1);
        end
    end

    function btn_square_callback(hObject,~)
        if get(hObject,'Value') == 1
            square_on = 1;
            set(btn_sine,'Value',0);
            set(btn_triangle,'Value',0);
            set(btn_sawtooth,'Value',0);
        else
            square_on = 0;
            set(hObject,'Value',1);
        end
    end

    function btn_sine_callback(hObject,~)
        if get(hObject,'Value') == 1
            sine_on = 1;
            set(btn_square,'Value',0);
            set(btn_triangle,'Value',0);
            set(btn_sawtooth,'Value',0);
        else
            sine_on = 0;
            set(hObject,'Value',1);
        end
    end

    function btn_triangle_callback(hObject,~)
        if get(hObject,'Value') == 1
            triangle_on = 1;
            set(btn_square,'Value',0);
            set(btn_sine,'Value',0);
            set(btn_sawtooth,'Value',0);
        else
            triangle_on = 0;
            set(hObject,'Value',1);
        end
    end

    function btn_sawtooth_callback(hObject,~)
        if get(hObject,'Value') == 1
            sawtooth_on = 1;
            set(btn_square,'Value',0);
            set(btn_sine,'Value',0);
            set(btn_triangle,'Value',0);
        else
            sawtooth_on = 0;
            set(hObject,'Value',1);
        end
    end

% 5. 生成信号
    function signal = generate_signal(freq,square_on,sine_on,triangle_on,sawtooth_on)
        t = 0:1/freq:1;
        signal = zeros(size(t));
        if square_on
            signal = square(2*pi*freq*t);
        elseif sine_on
            signal = sin(2*pi*freq*t);
        elseif triangle_on
            signal = sawtooth(2*pi*freq*t,0.5);
            signal(signal<0) = -signal(signal<0);
        elseif sawtooth_on
            signal = sawtooth(2*pi*freq*t,0);
        end
    end
end

在这个GUI中，你可以通过选择信号源1或2的按钮来选择要发送信号的信号源。你也可以通过选择方波、正弦波、三角波或锯齿波的按钮来选择要生成的信号类型。你可以在频率输入框中输入信号的频率，然后按下开始按钮来生成信号并将其发送到选定的信号源。你可以根据需要修改此代码以满足你的需求。