a general presentation with MATLAB program and some usefu tricks.

1. 使用 Matlab GUI 建立簡單的
加法 器和創建卡的魔
術。

2. 大網
 前言
 加法器
 卡的魔術
 結論

3. MATLAB （矩陣實驗室）是一個數值計算環境和
第四代編程語言。 第一 Matlab 軟件已經制定於
1984 年。在工程世界， MATLAB 是一個非常重
要的軟體，因為它可以：
•建立軟體
•創建應用程序
•解決數學函數
我們將建立一個簡單的加法器和創建一個卡的魔
術。

4. 一 . 加法器
步驟
1.打開 MATLAB command: >> guide blank GUI
2.拖放 :
3.2 ‘edit text’ 按鈕 = inputs 輸入
equal sign 等號 (=)
1.2 ‘static text’ 按鈕
2. output 產量
3.1 ‘push button’ 按鈕 = sign 加號

5. 雙擊每個元素 .
看此表上註明，並修改其屬性 .
Component HorizontalAlignment String Tag
Top Edit Text right 0 edit1
Bottom Edit Text right 0 edit2
Left Static Text center = text1
Rigth Static Text right 0 result
Push-button center + pushbutton1

7.
function edit1_Callback(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version
of MLB
% 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
num = str2double(get(hObject,'String'));
if isnan(num)
num = 0;
set(hObject,'String',num);
errordlg('Input must be a number', 'Error')
end
handles.edit1 = num;
guidata(hObject,handles)

8. function edit2_Callback(hObject, eventdata, handles)
% hObject handle to edit2 (see
GCBO)
% eventdata reserved - to be
defined in a future version of MLB
% handles structure with
handles and user data (see GUIDATA)
% Hints: get(hObject,'String')
returns contents of edit2 as text
%str2double(get(hObject,'String'))
returns contents of
%edit2 as a double
num =
str2double(get(hObject,'String'));
if isnan(num)
num = 0;
set(hObject,'String',num);
errordlg('Input must be a
number', 'Error')
end
handles.edit2 = num;
guidata(hObject,handles)

9. --- 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 MLB
% handles structure with handles and user
data (see GUIDATA)
addition = handles.edit1 + handles.edit2;
set(handles.result, 'String', addition);

10.  % --- Executes just before adder is made visible.
function adder_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 MLB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to adder (see VARARGIN)
% Choose default command line output for adder
handles.output = hObject;
num = 0;
handles.edit1 = num;
handles.edit2 = num;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes adder wait for user response (see UIRESUME)
% uiwait(handles.figure1);

11. 最後的結果是

12. 二 . 卡的魔術
我們現在要招 callback 功能要開發另一個電腦卡在
MatlabGUI 。
步驟
1.打開 MATLAB command: >> guide blank GUI
2.拖放 :
3.1 個 ‘ axes’ 按鈕
4. 1 個 ‘ static text ’ 按鈕
5.1 個 ‘ push button’ 按鈕

13.  雙擊每個元素 .
看此表上註明，並修改其屬性 .
Tag axes1 text1 pushbutton1
Position 4 6 75 22 84 15 23 8 83 6 22 2.5
FontSize 10 10
FontWeight bold bold
HorizontalAllignment left left
String
Choose a card
Don’t forget it!
Concentrate...
Continue...

14. • 現在你應該有類似此圖片
* 設置這些屬性存你的身材名稱為“ trick2.fig”.
* 編輯回調函數 callback-functions

15. * 編輯回調函數 callback-functions
 % --- Executes just before trick2 is made visible.
function trick2_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 trick2 (see VARARGIN)
 % Choose default command line output for trick2
handles.output = hObject;
 clc
axes(handles.axes1);
bg = imread('trick2_001.jpg');
image(bg);
axis off;
 % Update handles structure
guidata(hObject, handles);
 % UIWAIT makes trick2 wait for user response (see UIRESUME)
% uiwait(handles.figure1);

16.  For the callback associated with the push-button, complete it like
this:
 % --- 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)
str = {'I see it clearly... ';
'';
'';
'I have made your card vanish!!'};
set(handles.text1,'String',str);
axes(handles.axes1);
bg = imread('trick2_002.jpg');
image(bg);
axis off;
 set(handles.pushbutton1,'Visible','off')

17.  最後，我們下載中心的圖像從這個網頁
http://www.matrixlab-examples.com/card-trick.html
運行文件“ trick2.m”

18.  點擊“繼續”按鈕，我們得到

19. 結論
MATLAB 是一種非常有用的，非常強大的一個軟件。
我們可以使用 MATLAB 的應用範圍，包括信號處理和通
信，圖像和視頻處理，控制系統，測試和測量，計算金
融學，計算生物學，機械和土木工程等 ...
但 matlab 的也有一些缺點。它使用了大量的內存和
較慢的計算機上。

20. references
 http://www.mathworks.com/products/matlab/
 http://www.matrixlab-examples.com/card-trick.html
 http://stackoverflow.com/questions/179904/what-is-matlab-good-for-why-is-it-so-used-by-u
 http://en.wikipedia.org/wiki/MATLAB
 http://www.mccormick.northwestern.edu/docs/efirst/matlab.pdf
 http://answers.yahoo.com/question/index?qid=20100605122719AAlCO8T
 http://www.ee.columbia.edu/~marios/matlab/matlab_tricks.html
 http://www.math.umd.edu/undergraduate/schol/matlab/description.html