效果如如下：
整个工程还是挺简单的，之前一直都是用matlab做信号处理，由于要做课程设计，就学了一下matlab的GUI。下面总结几个关键的地方。
（1）控件拉到自己喜欢的位置，并将控件的Text和Tag改好（不改也行，看个人习惯）
（2）设置一个全局变量global TextString，用来记录用户按了什么按钮，把字符串拼接起来
（3）做好每个按钮的回调函数的工作
（4）eval（）函数能够把字符串转换成matlab命令并返回结果（用在‘=’的回调函数）
function varargout = untitled2(varargin)% UNTITLED2 MATLAB code for untitled2.fig%UNTITLED2, by itself, creates a new UNTITLED2 or raises the existing%singleton*.%%H = UNTITLED2 returns the handle to a new UNTITLED2 or the handle to%the existing singleton*.%%UNTITLED2('CALLBACK',hObject,eventData,handles,...) calls the local%function named CALLBACK in UNTITLED2.M with the given input arguments.%%UNTITLED2('Property','Value',...) creates a new UNTITLED2 or raises the%existing singleton*. Starting from the left, property value pairs are%applied to the GUI before untitled2_OpeningFcn gets called. An%unrecognized property name or invalid value makes property application%stop. All inputs are passed to untitled2_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% Edit the above text to modify the response to help untitled2% Last Modified by GUIDE v2.5 09-Jul- 22:30:29% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ...'gui_Singleton', gui_Singleton, ...'gui_OpeningFcn', @untitled2_OpeningFcn, ...'gui_OutputFcn', @untitled2_OutputFcn, ...'gui_LayoutFcn', [] , ...'gui_Callback', []);if nargin && ischar(varargin{1})gui_State.gui_Callback = str2func(varargin{1});endif nargout[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});elsegui_mainfcn(gui_State, varargin{:});end% End initialization code - DO NOT EDIT% --- Executes just before untitled2 is made visible.function untitled2_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 untitled2 (see VARARGIN)% Choose default command line output for untitled2handles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes untitled2 wait for user response (see UIRESUME)% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line.function varargout = untitled2_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 structurevarargout{1} = handles.output;function window_Callback(hObject, eventdata, handles)% hObject handle to window (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 window as text% str2double(get(hObject,'String')) returns contents of window as a double% --- Executes during object creation, after setting all properties.function window_CreateFcn(hObject, eventdata, handles)% hObject handle to window (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor','white');endglobal TextString% --- Executes on button press in one.function one_Callback(hObject, eventdata, handles)% hObject handle to one (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.one,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in two.function two_Callback(hObject, eventdata, handles)% hObject handle to two (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.two,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in three.function three_Callback(hObject, eventdata, handles)% hObject handle to three (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.three,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in four.function four_Callback(hObject, eventdata, handles)% hObject handle to four (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.four,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in five.function five_Callback(hObject, eventdata, handles)% hObject handle to five (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.five,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in six.function six_Callback(hObject, eventdata, handles)% hObject handle to six (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.six,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in seven.function seven_Callback(hObject, eventdata, handles)% hObject handle to seven (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.seven,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in eight.function eight_Callback(hObject, eventdata, handles)% hObject handle to eight (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.eight,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in nine.function nine_Callback(hObject, eventdata, handles)% hObject handle to nine (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.nine,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in addition.function addition_Callback(hObject, eventdata, handles)% hObject handle to addition (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.addition,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in subtraction.function subtraction_Callback(hObject, eventdata, handles)% hObject handle to subtraction (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.subtraction,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in multiplication.function multiplication_Callback(hObject, eventdata, handles)% hObject handle to multiplication (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.multiplication,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in division.function division_Callback(hObject, eventdata, handles)% hObject handle to division (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.division,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in sqrt.function sqrt_Callback(hObject, eventdata, handles)% hObject handle to sqrt (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.sqrt,'String')TextString = strcat(TextString , textString) set(handles.window,'string',textString)% --- Executes on button press in sin.function sin_Callback(hObject, eventdata, handles)% hObject handle to sin (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.sin,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in cos.function cos_Callback(hObject, eventdata, handles)% hObject handle to cos (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.cos,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in tan.function tan_Callback(hObject, eventdata, handles)% hObject handle to tan (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.tan,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in square.function square_Callback(hObject, eventdata, handles)% hObject handle to square (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.square,'String')TextString = strcat(TextString ,'^2') set(handles.window,'string',textString)% --- Executes on button press in cot.function cot_Callback(hObject, eventdata, handles)% hObject handle to cot (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.cot,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in equal.function equal_Callback(hObject, eventdata, handles)% hObject handle to equal (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringans = eval(TextString)a = strcat(TextString,'=')aa = strcat(a,num2str(ans))set(handles.window,'string',aa)TextString = []% --- Executes on button press in right.function right_Callback(hObject, eventdata, handles)% hObject handle to right (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.right,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in left.function left_Callback(hObject, eventdata, handles)% hObject handle to left (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringtextString = get(handles.left,'String')TextString = strcat(TextString ,textString) set(handles.window,'string',textString)% --- Executes on button press in qingkong.function qingkong_Callback(hObject, eventdata, handles)% hObject handle to qingkong (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global TextStringTextString = []
