Как построить график в матлабе по точкам

x=[1 2 3 4];
y=[1 4 6 9];
plot(x,y,'o-');

function varargout = lab333(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @lab333_OpeningFcn, ...
                   'gui_OutputFcn',  @lab333_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
function lab333_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
guidata(hObject, handles);
function varargout = lab333_OutputFcn(hObject, eventdata, handles) 
varargout{1} = handles.output;
 
function pushbutton1_Callback(hObject, eventdata, handles)
 
 
function Im_Callback(hObject, eventdata, handles)
 
function Im_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end
 
 
 
function Real_Callback(hObject, eventdata, handles)
 
function Real_CreateFcn(hObject, eventdata, handles)

function varargout = lab333_OutputFcn(hObject, eventdata, handles) 
varargout{1} = handles.output;
S=get(handles.Im,'String');
y=eval(S{:});
S=get(handles.Real,'String');
x=eval(S{:});
plot(x,y,'.-')