一個簡單的Matlab_GUI編程實例

1、Matlab GUI編程教程（適用于初學(xué)者）1首先我們新建一個GUI文件：File/New/GUI 如下圖所示；下載 (42.3 KB)2009-5-31 22:19選擇Blank GUI(Default)2進(jìn)入GUI開發(fā)環(huán)境以后添加兩個編輯文本框，6個靜態(tài)文本框，和一個按鈕，布置如下圖所示；下載 (28.24 KB)2009-5-31 22:19布置好各控件以后，我們就可以來為這些控件編寫程序來實現(xiàn)兩數(shù)相加的功能了。3我們先為數(shù)據(jù)1文本框添加代碼；下載 (11.54 KB)2009-5-31 22:19點擊上圖所示紅色方框，選擇edit1_Callback，光標(biāo)便立刻移到下面這段代碼的位置。

2、 1.2.3. function edit1_Callback(hObject, eventdata, handles) 4. % hObject handle to edit1 (see GCBO) 5. % eventdata reserved - to be defined in a future version of MATLAB 6. % handles structure with handles and user data (see GUIDATA) 7. % Hints: get(hObject,String) returns contents of edit1 as text

3、 8. % str2double(get(hObject,String) returns contents of edit1 as a double復(fù)制代碼然后在上面這段代碼的下面插入如下代碼：1.2. %以字符串的形式來存儲數(shù)據(jù)文本框1的內(nèi)容. 如果字符串不是數(shù)字，則現(xiàn)實空白內(nèi)容input = str2num(get(hObject,String); %檢查輸入是否為空. 如果為空,則默認(rèn)顯示為0if (isempty(input) set(hObject,String,0)endguidata(hObject, handles);復(fù)制代碼這段代碼使得輸入被嚴(yán)格限制，我們不能試圖輸入一個非數(shù)

4、字。4為edit2_Callback添加同樣一段代碼5現(xiàn)在我們?yōu)橛嬎惆粹o添加代碼來實現(xiàn)把數(shù)據(jù)1和數(shù)據(jù)2相加的目的。用3中同樣的方法在m文件中找到pushbutton1_Callback代碼段如下；1. function pushbutton1_Callback(hObject, eventdata, handles)2. % hObject handle to pushbutton1 (see GCBO)3. % eventdata reserved - to be defined in a future version of MATLAB4. % handles structure with

5、 handles and user data (see GUIDATA)復(fù)制代碼在上面這段代碼后添加以下代碼；1. a = get(handles.edit1,String);2. b = get(handles.edit12,String);3. % a and b are variables of Strings type, and need to be converted 4. % to variables of Number type before they can be added together total = str2num(a) + str2num(b);5. c = num

6、2str(total);6. % need to convert the answer back into String type to display it7. set(handles.text1,String,c);8. guidata(hObject, handles);復(fù)制代碼下面我們來對上面這段程序分析一下； 1. a = get(handles.edit1,String); b = get(handles.edit2,String);復(fù)制代碼上面這行代碼把用戶輸入的數(shù)據(jù)存入到變量a,變量b中； 1. % a,b是字符型變量，在計算兩者相加之前需把他們轉(zhuǎn)換為數(shù)字型total = str2num(a) + str2num(b);復(fù)制代碼這段代碼實現(xiàn)兩數(shù)相加c = num2str(total); 1. set(handles.text3,String,c);guidata(hObject, handles);復(fù)制代碼以上兩行代碼分別用來更