Calculator by matlab sin, cos, tan

Hi I have made a new GUI in matlab for a calculator. The calculator is fully working exept there is an error with the sin, cos and tan buttons. If i click one of them i get this error:

Error in @(hObject,eventdata)calculator('pushbutton13_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

I think i made an error in the pushbutton code, just not sure whats the error

I have attached the m file for the calculator pluss the figure.

Answer 1

[David Sanchez]

You wrote the sin. cos and tan funcitons beggining with with capital letters:

Sin, Cos and Tan in your code.

Write the functions like this:

% --- 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)
textstring = get(handles.text1,'string');
textstring = strcat(textstring,'tan')
set(handles.text1,'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)
textstring = get(handles.text1,'string');
textstring = strcat(textstring,'sin')
set(handles.text1,'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)
textstring = get(handles.text1,'string');
textstring = strcat(textstring,'cos')
set(handles.text1,'string',textstring);

[Gry]

Thank you so much!

Really appreciate it

[David Sanchez]

accept the answer then, thanks

Answer 2

[James Berryman]

how would I use MATLAB to find tan2x − sec2x.

[Walter Roberson]

f1 = @(x) tan(2*x) - sec(2*x)
f2 = @(x) tan(x).^2 - sec(x).^2

and call f1(x) or f2(x) depending which of the two meanings you intended.