用matlabguide做圆周卷积时域演示系统代码

下面是一个基于MATLAB GUIDE的圆周卷积时域演示系统的示例代码：

function varargout = circularConvolutionGUI(varargin)
% CIRCULARCONVOLUTIONGUI MATLAB code for circularConvolutionGUI.fig
%      CIRCULARCONVOLUTIONGUI, by itself, creates a new CIRCULARCONVOLUTIONGUI or raises the existing
%      singleton*.
%
%      H = CIRCULARCONVOLUTIONGUI returns the handle to a new CIRCULARCONVOLUTIONGUI or the handle to
%      the existing singleton*.
%
%      CIRCULARCONVOLUTIONGUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in CIRCULARCONVOLUTIONGUI.M with the given input arguments.
%
%      CIRCULARCONVOLUTIONGUI('Property','Value',...) creates a new CIRCULARCONVOLUTIONGUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before circularConvolutionGUI_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to circularConvolutionGUI_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 circularConvolutionGUI

% Last Modified by GUIDE v2.5 02-Apr-2021 12:13:58

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @circularConvolutionGUI_OpeningFcn, ...
                   'gui_OutputFcn',  @circularConvolutionGUI_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 circularConvolutionGUI is made visible.
function circularConvolutionGUI_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 circularConvolutionGUI (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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

% --- Outputs from this function are returned to the command line.
function varargout = circularConvolutionGUI_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 pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Read input sequences
x = str2num(get(handles.edit1, 'String'));
h = str2num(get(handles.edit2, 'String'));

% Perform circular convolution
y = cconv(x, h, length(x));

% Plot the result
axes(handles.axes1);
stem(y);
xlabel('n');
ylabel('y[n]');
title('Circular Convolution');
grid on;


% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Clear input sequences and result
set(handles.edit1, 'String', '');
set(handles.edit2, 'String', '');
axes(handles.axes1);
cla;


% --- Executes during object deletion, before destroying properties.
function figure1_DeleteFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Clear input sequences and result
set(handles.edit1, 'String', '');
set(handles.edit2, 'String', '');
axes(handles.axes1);
cla;


% --- Executes on key press with focus on pushbutton1 and none of its controls.
function pushbutton1_KeyPressFcn(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  structure with the following fields (see MATLAB.UI.CONTROL.UICONTROL)
%   Key: name of the key that was pressed, in lower case
%   Character: character interpretation of the key(s) that was pressed
%   Modifier: name(s) of the modifier key(s) (i.e., control, shift) pressed
if strcmp(eventdata.Key, 'return')
    pushbutton1_Callback(hObject, eventdata, handles);
end


% --- Executes on key press with focus on pushbutton2 and none of its controls.
function pushbutton2_KeyPressFcn(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  structure with the following fields (see MATLAB.UI.CONTROL.UICONTROL)
%   Key: name of the key that was pressed, in lower case
%   Character: character interpretation of the key(s) that was pressed
%   Modifier: name(s) of the modifier key(s) (i.e., control, shift) pressed
if strcmp(eventdata.Key, 'return')
    pushbutton2_Callback(hObject, eventdata, handles);
end

上述代码中，cconv函数是MATLAB中的一个内置函数，用于计算圆周卷积。这个GUI界面包含两个文本编辑框，用户可以在其中输入两个输入序列。点击“Calculate”按钮后，会读取输入序列并执行圆周卷积操作，然后将结果绘制在图形窗口中。点击“Clear”按钮或者关闭程序窗口时，输入序列和结果会被清空。

为了使用这个代码，你需要在MATLAB中创建一个新的GUI应用程序（使用GUIDE工具），然后将上述代码复制到GUI应用程序的.m文件中，并将对应的GUI控件（如文本编辑框、按钮和图形窗口）添加到GUI界面中。最后，保存并运行GUI应用程序即可。