Hey can you please help me with these errors im getting from my GUI

% --- Executes on button press in pushbutton1.

function pushbutton1_Callback(hObject, eventdata, handles)

syms x;

format long

h=get(handles.edit1,'string');

a=str2double(get(handles.edit2,'string'));

b=str2double(get(handles.edit3,'string'));

it=str2double(get(handles.edit4,'string'));

ha=subs(h,a);

hb=subs(h,b);

i=0;

while i~=it

i=i+1;

r=(ha*b-hb*a)/(ha-hb);

fr=subs(h,r);

if fr>it; a=b; b=r;

end

end

if i==it;

set(handles.raiz,'String',r);

end

THESE ARE MY ERRORS

Error using matlab.ui.control.UIControl/set

While setting the 'String' property of UIControl:

String should be char, numeric or cell array datatype.

Error in metodo_de_la_secante>pushbutton1_Callback (line 187)

set(handles.raiz,'String',r);

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in metodo_de_la_secante (line 42)

gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)metodo_de_la_secante('pushbutton1_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback

Answer 1

[Ameer Hamza]

Try this

 set(handles.raiz,'String',num2str(r));

Convert the numeric value to character value.

[Image Analyst]

Or, with the preferred, current OOP syntax:

handles.raiz.String = num2str(r); % or sprintf('%.4f', r) if you want more control over its format

[Alejandro Valdivia Hernandez]

thanks, both worked