matlab sciencetific calculator error

function varargout = calc(varargin)
% CALC MATLAB code for calc.fig
%      CALC, by itself, creates a new CALC or raises the existing
%      singleton*.
%
%      H = CALC returns the handle to a new CALC or the handle to
%      the existing singleton*.
%
%      CALC('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in CALC.M with the given input arguments.
%
%      CALC('Property','Value',...) creates a new CALC or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before calc_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to calc_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 calc

% Last Modified by GUIDE v2.5 09-Nov-2022 21:27:52

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @calc_OpeningFcn, ...
                   'gui_OutputFcn',  @calc_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 calc is made visible.
function calc_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 calc (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes calc wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = calc_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 button press in Einput2.
function Einput2_Callback(hObject, eventdata, handles)
% hObject    handle to Einput2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in Btambah.
function Btambah_Callback(hObject, eventdata, handles)
% hObject    handle to Btambah (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
a=get(handles.Einput1,'string');
b=get(handles.Einput2,'string');
c=str2num(a)+str2num(b);
jawab=num2str(c);
set(handles.hasil,'string',jawab);


% --- Executes on button press in Bkurang.
function Bkurang_Callback(hObject, eventdata, handles)
% hObject    handle to Bkurang (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
a=get(handles.Einput1,'string');
b=get(handles.Einput2,'string');
c=str2num(a)-str2num(b);
jawab=num2str(c);
set(handles.hasil,'string',jawab);


% --- Executes on button press in Bkali.
function Bkali_Callback(hObject, eventdata, handles)
% hObject    handle to Bkali (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
a=get(handles.Einput1,'string');
b=get(handles.Einput2,'string');
c=str2num(a)*str2num(b);
jawab=num2str(c);
set(handles.hasil,'string',jawab);


% --- Executes on button press in Bbagi.
function Bbagi_Callback(hObject, eventdata, handles)
% hObject    handle to Bbagi (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
a=get(handles.Einput1,'string');
b=get(handles.Einput2,'string');
c=str2num(a)/str2num(b);
jawab=num2str(c);
set(handles.hasil,'string',jawab);


% --- Executes on button press in Breset.
function Breset_Callback(hObject, eventdata, handles)
% hObject    handle to Breset (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
set(handles.Einput1,'String');
set(handles.Einput2,'string');
set(handles.hasil,'String');


% --- Executes on button press in sinus.
function sinus_Callback(hObject, eventdata, handles)
% hObject    handle to sinus (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- 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
textstring = get(handles.Einput1,'string');
textstring = strcat(Einput1,'cos')
set(handles.hasil,'string',jawab);


% --- Executes on button press in Ktutup.
function Ktutup_Callback(hObject, eventdata, handles)
% hObject    handle to Ktutup (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in Kbuka.
function Kbuka_Callback(hObject, eventdata, handles)
% hObject    handle to Kbuka (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)



function Einput3_Callback(hObject, eventdata, handles)
% hObject    handle to Einput3 (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 Einput3 as text
%        str2double(get(hObject,'String')) returns contents of Einput3 as a double
Einput3 = get(handles.Einput3,'String');
Einput3 = strcat(Einput3,'cos(pi/180*');
set(handles.Einput3,'String',jawab);

i got some problem i'm new on matlab and i met this problem how do i make sin,cos tan in this program? do some tutorial from google but still dont work

[David Hill]

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