leakdemo.m

来自「很多matlab的源代码」· M 代码 · 共 125 行

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

% Last Modified by GUIDE v2.5 01-Nov-2004 21:52:25

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

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = leakdemo_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 Number_CreateFcn(hObject, eventdata, handles)
% hObject    handle to Number (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background, change
%       'usewhitebg' to 0 to use default.  See ISPC and COMPUTER.
usewhitebg = 1;
if usewhitebg
    set(hObject,'BackgroundColor',[.9 .9 .9]);
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end


% --- Executes on slider movement.
function Number_Callback(hObject, eventdata, handles)
% hObject    handle to Number (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,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
axes(handles.axes1);
N=floor(get(handles.Number,'value'))
n=0:(N-1);
w=pi/5;
x=sin(w*n);
X=fft(x,N);
handle=stem(n,x);
set(handle,'LineWidth',2);
Title('sin(pi/5*n)');
axis([0,N-1,-1,1]);
axes(handles.axes2);
handle=stem(n,abs(X));
set(handle,'LineWidth',2);
Title('magnitude spectra');
axis([0,N-1,0,max(abs(X))]);
set(handles.text_NN,'string',int2str(N));


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