sample_sequence.asv

很多matlab的源代码

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

% Last Modified by GUIDE v2.5 03-Jun-2004 17:20:25

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

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = sample_sequence_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;
function [c,l]=DFT(x,N,str)
 n=0:N-1;
 k=-200:200;
 w=(pi/100)*k;
 l=w;
 c=x*(exp(-j*pi/100)).^(n'*k);  %计算DFT[x(n)]
 magX=abs(c);                    %幅值
 angX=angle(c);                 %辅角
 
 subpolt(2,2,1);
 t=max(x);
 n=0:N-1;
 stem(n,x,'.');
 xlabel('n')
 ylabel('xa(n)');
 title('信号的原型');
 text((0.3*N),(0.8*t),str);
 hold on
 n=0:N-1;
 m=zeros(N);
 plot(n,m);
 
 subpolt(2,2,3);
 plot(w/pi,magX);
 xlabel('w/pi');
 ylabel('|Y(jw)|');
 title('上图信号的傅氏变换');
 
 %产生信号xa(n)
 function c=FF(A,a,w,fs)
 n=0:50-1;
 c=A*exp((-a)*n/fs).*sin(w*n/fs).*stepseq(0,0,49);
 %产生矩形框信号
 function [x,n]=stepseq(n0,n1,n2)
 n=[n1:n2];
 x=[(n-n0)>=0];

% --- 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


% --- Executes during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit2 (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 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


% --- Executes during object creation, after setting all properties.
function edit3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit3 (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 edit3_Callback(hObject, eventdata, handles)
% hObject    handle to edit3 (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 edit3 as text
%        str2double(get(hObject,'String')) returns contents of edit3 as a double


% --- Executes during object creation, after setting all properties.
function edit4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit4 (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 edit4_Callback(hObject, eventdata, handles)
% hObject    handle to edit4 (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 edit4 as text
%        str2double(get(hObject,'String')) returns contents of edit4 as a double


% --- 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)
i=0;
A='get(edit1,''string'')';
a='get(edit2,''string'')';
w='get(edit3,''string'')';
fs='get(edit4,''string'')';
Xa=FF(A,a,w,fs);
i=i+1;
string=['fs=',num2str(fs)];
figure(i)
DFT(Xa,50,string);
% --- 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)
set(edit1,''string'',);%置空
set(edit2,''string'',)';
set(edit3,''string'',);
set(edit4,''string'',);
% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
experiment.m;