convolution.m

经典《信号与系统》教程的matlab例程,对深入理解信号与系统相关概念有很大帮助

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

% Last Modified by GUIDE v2.5 21-May-2005 08:53:53

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @convolution_OpeningFcn, ...
                   'gui_OutputFcn',  @convolution_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(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 convolution is made visible.
function convolution_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 convolution (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = convolution_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 during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function edit1_Callback(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit1 as text
%        str2double(get(hObject,'String')) returns contents of edit1 as a double
%U-------------------------------------------------------------------------
t=-6:0.01:6;
x=str2num(get(hObject,'String'));
%U-------------------------------------------------------------------------



function edit2_Callback(hObject, eventdata, handles)
% hObject    handle to edit2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit2 as text
%        str2double(get(hObject,'String')) returns contents of edit2 as a double
%U-------------------------------------------------------------------------
t=-6:0.01:6;
h=str2num(get(hObject,'String'));
%U-------------------------------------------------------------------------


% --- 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)
%U-------------------------------------------------------------------------
 pushbutton2_CreateFcn(hObject, eventdata, handles)
%U-------------------------------------------------------------------------


% --- 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)
close(convolution)


% --- Executes during object creation, after setting all properties.
function pushbutton2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

%U-------------------------------------------------------------------------
y=0.01*conv(x,h);
x1=plot(t,x)
h1=plot(t,h)
y=y([600:1800]);
y1=plot(t,y)
%U-------------------------------------------------------------------------