matlab用gui编写信号的代码

以下是一个MATLAB GUI应用程序的示例，用于读取并显示音频信号：

function varargout = signal_gui(varargin)
% SIGNAL_GUI MATLAB code for signal_gui.fig
%      SIGNAL_GUI, by itself, creates a new SIGNAL_GUI or raises the existing
%      singleton*.
%
%      H = SIGNAL_GUI returns the handle to a new SIGNAL_GUI or the handle to
%      the existing singleton*.
%
%      SIGNAL_GUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in SIGNAL_GUI.M with the given input arguments.
%
%      SIGNAL_GUI('Property','Value',...) creates a new SIGNAL_GUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before signal_gui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to signal_gui_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help signal_gui

% Last Modified by GUIDE v2.5 01-Nov-2021 10:19:48

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @signal_gui_OpeningFcn, ...
                   'gui_OutputFcn',  @signal_gui_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before signal_gui is made visible.
function signal_gui_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to signal_gui (see VARARGIN)

% Choose default command line output for signal_gui
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes signal_gui wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = signal_gui_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes on button press in load_button.
function load_button_Callback(hObject, eventdata, handles)
% hObject    handle to load_button (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Open file dialog to select audio file
[file, path] = uigetfile('*.wav', 'Select an Audio File');
if isequal(file,0)
    disp('User selected Cancel')
else
    % Read audio file and store in handles structure
    [y, Fs] = audioread(fullfile(path,file));
    handles.y = y;
    handles.Fs = Fs;
    % Plot audio waveform
    t = (0:length(y)-1)/Fs;
    plot(handles.axes1, t, y);
    xlabel(handles.axes1, 'Time (s)');
    ylabel(handles.axes1, 'Amplitude');
    title(handles.axes1, 'Audio Waveform');
    % Update handles structure
    guidata(hObject, handles);
end

这个GUI应用程序包括一个“Load”按钮，用于打开文件对话框并选择音频文件。一旦选择了文件，应用程序将读取文件，绘制音频波形并将其显示在GUI中的绘图区域中。您可以将此代码作为起点，根据需要进行修改和扩展。