gui_polyder_12_6.asv

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function varargout = gui_grid(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @gui_grid_OpeningFcn, ...
                   'gui_OutputFcn',  @gui_grid_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
function gui_grid_OpeningFcn(hObject, eventdata, handles, varargin)
set(handles.n_edit,'String','5');
set(handles.x_edit,'String','3.3');
handles.output = hObject;
guidata(hObject, handles);
function varargout = gui_polyder_grid_OutputFcn(hObject, eventdata, handles) 
varargout{1} = handles.output;
function polyder_pushbutton_Callback(hObject, eventdata, handles)
x= 0:0.1:8; 
y= cos(x).*log(3+ x.^2+ exp(x.^2));
n=str2num(get(handles.n_edit,'String'));
p= polyfit(x,y,n);
set(handles.poly2str_text,'String', strcat(num2str(n),'阶拟合多项式为：',poly2str(p,'x')));
p1= polyder(p);
p2= polyder(p1);
X=str2num(get(handles.x_edit,'String'));
x0= polyval(p,X);
x1= polyval(p1,X);
x2= polyval(p2,X);
set(handles.label_text,'String',[strcat('X=',num2str(X),'处的'),blanks(10),'函数值',blanks(8),'一阶导',blanks(8),'二阶导']);
set(handles.polyder_text,'String',num2str([x0,x1,x2]));
y1= polyval(p,x);
plot(x,y,'r:',x,y1,'b-');
legend('f(x)','拟合曲线',0);
title('cos(x).*log(3+ x.^2+ exp(x.^2))','Fontsize',12,'FontWeight','bold');
function close_pushbutton_Callback(hObject, eventdata, handles)
close
function x_edit_Callback(hObject, eventdata, handles)
function x_edit_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end
function n_edit_Callback(hObject, eventdata, handles)
function n_edit_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end
function polyder_menu_Callback(hObject, eventdata, handles)
polyder_pushbutton_Callback(hObject, eventdata, handles)
function close_menu_Callback(hObject, eventdata, handles)
close
function file_menu_Callback(hObject, eventdata, handles)