zexc.m

matlab实现线性最小二乘

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

% Copyright 2002-2003 The MathWorks, Inc.

% Edit the above text to modify the response to help zexc

% Last Modified by GUIDE v2.5 18-Nov-2008 11:03:05

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

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = zexc_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 x_Callback(hObject, eventdata, handles)
% hObject    handle to x (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 x as text
%        str2double(get(hObject,'String')) returns contents of x as a double
x=str2num(get(hObject,'String'));
if isnan(x)
    set(hObject, 'String', 0);
    errordlg('Input must be a array','Error');
end

handles.zxec.x = x;
guidata(hObject,handles)

% --- Executes during object creation, after setting all properties.
function x_CreateFcn(hObject, eventdata, handles)
% hObject    handle to x (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 y_Callback(hObject, eventdata, handles)
% hObject    handle to y (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 y as text
%        str2double(get(hObject,'String')) returns contents of y as a double
y=str2num(get(hObject,'String'));
if isnan(y)
    set(hObject, 'String', 0);
    errordlg('Input must be a array','Error');
end

handles.zxec.y = y;
guidata(hObject,handles)


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


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


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


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

set(handles.a,'String',handles.zxec.a);
% --- Executes on button press in bBtn.
function bBtn_Callback(hObject, eventdata, handles)
% hObject    handle to bBtn (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
set(handles.b,'String',handles.zxec.b);

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

c=size(x);
n=c(2);
l=0;
m=0;
k=0;
p=0;
for i=1:n
    l=l+x(i)*y(i);
    m=m+x(i);
    k=k+y(i);
    p=p+x(i)^2;
 end
    a=(n*l-k*m)/(n*p-m^2);
    b=(k*p-l*m)/(n*p-m^2); 
    Y=a*x+b;
    plot(x,y,'r+',x,Y);
    handles.zxec.a=a;
    guidata(hObject,handles)
     handles.zxec.b=b;
     guidata(hObject,handles)



% --------------------------------------------------------------------
function open_Callback(hObject, eventdata, handles)
% hObject    handle to open (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
file = uigetfile('*.fig');
if ~isequal(file, 0)
    open(file);
end

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

printdlg(handles.figure1)

% --------------------------------------------------------------------
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)

selection = questdlg(['Close ' get(handles.figure1,'Name') '?'],...
                     ['Close ' get(handles.figure1,'Name') '...'],...
                     'Yes','No','Yes');
if strcmp(selection,'No')
    return;
end

delete(handles.figure1)