效果

plot 是画图
hold是hold on
show是显示
clear是清除坐标轴

代码

function varargout = untitled(varargin)
% UNTITLED MATLAB code 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('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in UNTITLED.M with the given input arguments.
%
%      UNTITLED('Property','Value',...) creates a new UNTITLED or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before untitled_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to untitled_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 untitled

% Last Modified by GUIDE v2.5 09-Oct-2023 20:03:32

% 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   command line arguments to untitled (see VARARGIN)

% Choose default command line output for untitled
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);
func_init_para(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 selection change in listbox1.
function listbox1_Callback(hObject, eventdata, handles)
% hObject    handle to listbox1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns listbox1 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from listbox1
global Para;
func_get_listbox(handles);

% --- Executes during object creation, after setting all properties.
function listbox1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to listbox1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: listbox 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');
end

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)   %plot
% 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)
func_plot(handles);

% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)   %hold
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global Para;
Para.hold_tile = get(handles.pushbutton2,'String');
if strcmp(Para.hold_tile,'hold')
    set(handles.pushbutton2,'String','unhold');
else
    set(handles.pushbutton2,'String','hold');
end

% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)   %clear
% hObject    handle to pushbutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global Para;
cla(Para.axes);
legend(Para.axes,'off')
title(Para.axes,{})
xlabel(Para.axes,{})
ylabel(Para.axes,{})
Para.DisplayName = {};

% --- Executes on button press in pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)   %show
% hObject    handle to pushbutton4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global Para;
func_get_listbox(handles);
tmpinfo = Para.lbox2_info;
tmpinfo = char(tmpinfo{:});
pha = Para.(tmpinfo);
fra = Para.x;
set(handles.uitable1,'Data', [fra',pha']);  % 鍦ㄨ〃鏍间腑鏄剧ず
set(handles.uitable1,'ColumnName' , {'x',tmpinfo});

function func_get_listbox(handles)
global Para;
str_1 = get(handles.listbox1,'String');
val_1 = get(handles.listbox1,'Value');
Para.lbox2_info = str_1(val_1);

function func_plot(handles)
global Para;
func_get_listbox(handles);
tmpinfo = Para.lbox2_info;
tmpinfo = char(tmpinfo{:});
pha = Para.(tmpinfo);
fra = Para.x;
Para.hold_tile = get(handles.pushbutton2,'String');
if strcmp(Para.hold_tile,'hold')
    hold(Para.axes,'on');
else
    hold(Para.axes,'off');
end
Para.fig = plot(Para.axes,fra,pha);
grid(Para.axes,'on');
xlabel(Para.axes,'x')
ylabel(Para.axes,tmpinfo)
Para.DisplayInfo = strcat(tmpinfo);
func_add_DisplayName;


function func_add_DisplayName
global Para;
DisplayInfo = Para.DisplayInfo;
if isempty(Para.DisplayName)
    Para.DisplayName{1} = DisplayInfo;
else
    Para.DisplayName{size(Para.DisplayName,2)+1} = DisplayInfo;
end
legend(Para.axes,Para.DisplayName);

function func_init_para(handles)
global Para;
Para.DisplayName = [];
Para.axes = handles.axes1;
handles.axes1.Toolbar.Visible = 'on';
Para.x = -pi+0.01:0.01:pi-0.01; 
Para.sin = sin(Para.x);
Para.cos = cos(Para.x);
Para.tan = tan(Para.x);
Para.cot = cot(Para.x);