MATLAB界面编程

Reference to non-exiting field!

控件没有添加Tag属性：

直接双击fig文件启动（会缺少初始化操作）和在m文件执行开始启动结果不一样：

编译fig程序为EXE文件可同时执行多个实例：

选择APP里面的Compiler:

选择自己的工程并build，最后会在对应的文件目录下会生出EXE文件：

设置背景颜色为白，方便截图(另存为emf再粘贴到word比较清晰)

附件：

 实现FFT的MATLAB图形界面：

function varargout = easy_fft_1(varargin)
% EASY_FFT_1 MATLAB code for easy_fft_1.fig
%      EASY_FFT_1, by itself, creates a new EASY_FFT_1 or raises the existing
%      singleton*.
%
%      H = EASY_FFT_1 returns the handle to a new EASY_FFT_1 or the handle to
%      the existing singleton*.
%
%      EASY_FFT_1(\'CALLBACK\',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in EASY_FFT_1.M with the given input arguments.
%
%      EASY_FFT_1(\'Property\',\'Value\',...) creates a new EASY_FFT_1 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before easy_fft_1_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to easy_fft_1_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 easy_fft_1

% Last Modified by GUIDE v2.5 10-Jul-2018 12:27:54

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct(\'gui_Name\',       mfilename, ...
                   \'gui_Singleton\',  gui_Singleton, ...
                   \'gui_OpeningFcn\', @easy_fft_1_OpeningFcn, ...
                   \'gui_OutputFcn\',  @easy_fft_1_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 easy_fft_1 is made visible.
function easy_fft_1_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 easy_fft_1 (see VARARGIN)

% Choose default command line output for easy_fft_1
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

%init
global ph;
global L;
global Fs;
global NFFT;
global x1;
global x2;

ph=0;
L=1024;
Fs=20000;
NFFT=1024;
x1=0;
x2=0;

global t_mv;
global t_mi;
t_mv =0;
t_mi =0;


% UIWAIT makes easy_fft_1 wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = easy_fft_1_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 selection change in listbox1.
function listbox1_Callback(hObject, eventdata, handles)
% hObject    handle to listbox1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,\'String\')) returns listbox1 contents as cell array
%        contents{get(hObject,\'Value\')} returns selected item from listbox1


% --- Executes during object creation, after setting all properties.
function listbox1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to listbox1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: listbox controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,\'BackgroundColor\'), get(0,\'defaultUicontrolBackgroundColor\'))
    set(hObject,\'BackgroundColor\',\'white\');
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
global Fs;
Fs=str2double(get(hObject,\'String\'));
fft_paras_dis(handles);




% --- 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 && isequal(get(hObject,\'BackgroundColor\'), get(0,\'defaultUicontrolBackgroundColor\'))
    set(hObject,\'BackgroundColor\',\'white\');
end


% --- Executes on selection change in popupmenu1.
function popupmenu1_Callback(hObject, eventdata, handles)
% hObject    handle to popupmenu1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,\'String\')) returns popupmenu1 contents as cell array
%        contents{get(hObject,\'Value\')} returns selected item from popupmenu1
global NFFT;%1024 512 256 128 64 32 16
contents = cellstr(get(hObject,\'String\'));
t=contents{get(hObject,\'Value\')};
NFFT=str2double(t);
fft_paras_dis(handles);



% --- Executes during object creation, after setting all properties.
function popupmenu1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to popupmenu1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

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


% --------------------------------------------------------------------
function menu1_t_Callback(hObject, eventdata, handles)
% hObject    handle to menu1_t (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- 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)
fft_plot(handles);

% --------------------------------------------------------------------
function openfile_1_ClickedCallback(hObject, eventdata, handles)
% hObject    handle to openfile_1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
%----
[filename, pathname] = uigetfile( ...
    {\'*.txt\', \'All TXT-Files (*.txt)\'; ...
        \'*.*\',\'All Files (*.*)\'}, ...
    \'Select Address Book\');
global File;
% If "Cancel" is selected then return
if isequal([filename,pathname],[0,0])
    return
    % Otherwise construct the full file name and _and load the file.
else
    File = fullfile(pathname,filename);
end

%open and read data from file
%
%file_name = [\'fir_1_input.txt\'];
infile = fopen (File, \'r\');
% read in data from the file
data = fscanf(infile, \'%f\');
fclose(infile);
global dd;
global L;
dd = data;%此处是列向量，需要转化为行向量
dd = dd\';
L=length(dd);% Length of signal
fft_paras_dis(handles);


% --- Executes on slider movement.
function slider1_Callback(hObject, eventdata, handles)
% hObject    handle to slider1 (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
global ph;
global L;
global Fs;
global NFFT;
ph=(get(hObject,\'Value\')/ get(hObject,\'Max\'))*1;
fft_paras_dis(handles);
fft_plot(handles);





% --- Executes during object creation, after setting all properties.
function slider1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider1 (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.
if isequal(get(hObject,\'BackgroundColor\'), get(0,\'defaultUicontrolBackgroundColor\'))
    set(hObject,\'BackgroundColor\',[.9 .9 .9]);
end





function fft_plot(handles)
%--------
global Fs; % Sampling frequency      
global NFFT; % = 512;
global dd;
global L;
T = 1/Fs;  % Sample time
%L=length(dd);% Length of signal
t = (0:L-1)*T*1000;                % Time vector/ms
% Sum of a 50 Hz sinusoid and a 120 Hz sinusoid
%x = 0.7*sin(2*pi*50*t) + sin(2*pi*120*t); 
%y = x + 2*randn(size(t));     % Sinusoids plus noise
%figure;
%axes(handles.axes1);
%subplot(2,1,1);
cla(handles.axes1);
plot(handles.axes1,t(1:L),dd(1:L),\'b\');%plot(Fs*t(1:50),y(1:50));
title(handles.axes1,\'Signal Corrupted with  Noise\')
xlabel(handles.axes1,\'time (milliseconds)\')
%-------------------------------------------------
%NFFT = 2^nextpow2(L); % Next power of 2 from length of y
global ph;
global x1;
global x2;
x1=ceil(ph*L+0.0001);%ceil(0)=0,so we add extral 0.001
if x1+NFFT-1<=L
    x2=x1+NFFT-1;
    dd_t = dd(x1:x2);
else
    x2=L;
    dd_t = [dd(x1:x2) zeros(1,NFFT-(x2-x1)-1)];%数据不够则补零
end
%
 
%
YY=fft(dd_t,NFFT);
Y = YY/(x2-x1+1);
f = Fs/2*linspace(0,1,NFFT/2+1);
A =2*abs(Y(1:NFFT/2+1));
% Plot single-sided amplitude spectrum.
%subplot(2,1,2);
%plot(handles.axes2,f,A) ;
A(1)=0;%delete the DC 
cla(handles.axes2);
stem(handles.axes2,f,A,\'b\');
title(handles.axes2,\'Single-Sided Amplitude Spectrum of y(t)\')
xlabel(handles.axes2,\'Frequency (Hz)\')
ylabel(handles.axes2,\'|Y(f)|\')
%%
disp(\'-----------------------------------------------\');
%YY(10:end)=0;

global t_mv;
global t_mi;
[t_mv ,t_mi]=max(A(1:NFFT/2+1));

pp=t_mi;
YY(pp)=0;YY(NFFT+2-pp)=0;
pp=t_mi-1;
if pp<1
  pp=1;
end
YY(pp)=0;YY(NFFT+2-pp)=0;
pp=t_mi+1;
YY(pp)=0;YY(NFFT+2-pp)=0;
%%
disp(\'YY:\');
disp(YY);
idd=ifft(YY,NFFT);
disp(\'idd:\');
disp(idd);
disp(\'length - idd:\');
disp(length(idd));
hold on;
x2_t = x1+length(idd)-1;
if(x2_t)>length(t)
    x2_t = length(t);
end  
plot(handles.axes1,t(x1:x2_t),abs(idd(1:x2_t-x1+1)),\'r\');
%
AYY=2*abs(YY(1:NFFT/2+1)/(x2-x1+1));%2*abs(Y(1:NFFT/2+1));
AYY(1)=0;%DC
stem(handles.axes2,f,AYY,\'r\') ;
disp(\'-----------------------------------------------\');

function fft_paras_dis(handles)
%
global ph;
global L;
global Fs;
global NFFT;
global x1;
global x2;
set(handles.text_paras,\'String\',[\'ph:\' num2str(ph) \'  L:\' num2str(L)  \'  N:\' num2str(NFFT)  \'  Fs:\' num2str(Fs) \'  x1:\' num2str(x1)  \'  x2:\'  num2str(x2)]);
global t_mv;
global t_mi;
global File;
set(handles.text_maxs,\'String\',[\'mv:\' num2str(t_mv) \'  mi:\' num2str(t_mi) \'   \' File]);



%%


% --------------------------------------------------------------------
function uipushtool5_ClickedCallback(hObject, eventdata, handles)
% hObject    handle to uipushtool5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
gen_txt_fft;
disp(\'gen txt ok!\');