下面是GUI的程序，

在c的地方设置的是可见光的波长，但是lamda_slider不能进行控制，默认波长600e-9，运行后只有c = [0 0 0;1 0 0]

求解

function varargout = untitled(varargin)

%UNTITLED M-file for untitled.fig

%      UNTITLED, by itself, creates a new UNTITLED or raises the existing

%      singleton*.

%

%      H = UNTITLED returns the handle to a new UNTITLED or the handle to

%      the existing singleton*.

%

%      UNTITLED('Property','Value',...) creates a new UNTITLED using the

%      given property value pairs. Unrecognized properties are passed via

%      varargin to untitled_OpeningFcn.  This calling syntax produces a

%      warning when there is an existing singleton*.

%

%      UNTITLED('CALLBACK') and UNTITLED('CALLBACK',hObject,...) call the

%      local function named CALLBACK in UNTITLED.M with the given input

%      arguments.

%

%      *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 untitled

% Last Modified by GUIDE v2.5 13-Aug-2008 15:51:13

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;

gui_State = struct('gui_Name',       mfilename, ...

'gui_Singleton',  gui_Singleton, ...

'gui_OpeningFcn', @untitled_OpeningFcn, ...

'gui_OutputFcn',  @untitled_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 untitled is made visible.

function untitled_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   unrecognized PropertyName/PropertyValue pairs from the

%            command line (see VARARGIN)

% Choose default command line output for untitled

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes untitled wait for user response (see UIRESUME)

% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.

function varargout = untitled_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 slider movement.

function lamda_slider_Callback(hObject, eventdata, handles)

% hObject    handle to lamda_slider (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

get(handles.lamda_slider,'Max');

get(handles.lamda_slider,'Value');

get(handles.lamda_slider,'Min');

% --- Executes during object creation, after setting all properties.

function lamda_slider_CreateFcn(hObject, eventdata, handles)

% hObject    handle to lamda_slider (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB

% handles    empty - handles not created until after all CreateFcns called

set(hObject,'Max',760e-9);

set(hObject,'Value',600e-9);

set(hObject,'Min',390e-9);

% Hint: slider controls usually have a light gray background.

if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor',[.9 .9 .9]);

end

% --- Executes on button press in start_pushbutton.

function start_pushbutton_Callback(hObject, eventdata, handles)

% hObject    handle to start_pushbutton (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB

% handles    structure with handles and user data (see GUIDATA)

lamda=get(handles.lamda_slider,'Value');

if lamda >= 622e-9c = [0 0 0;1 0 0],

elseif lamda >= 597e-9c = [0 0 0;1 0.38 0],

elseif lamda >= 577e-9c = [0 0 0;1 1 0],

elseif lamda >= 492e-9c = [0 0 0;0 1 0],

elseif lamda >= 450e-9c = [0 0 0;0 1 1],

elseif lamda >= 435e-9c = [0 0 0;0 0 1],

else c = [0 0 0;0.5 0 0.5],

end

......