Undefined function or variable 'Link'. Error in Robotics>b​tn_Forward​_Callback (line 158) L(1) = Link([0 L_1 0 pi/2]); Error in gui_mainfcn (line 95) feval(varargin{:}); Error in Robotics (line 42) gui_mainfcn(gui_State, varargin{:});

% --- Executes on button press in btn_Forward.

function btn_Forward_Callback(hObject, eventdata, handles)

% hObject    handle to btn_Forward (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB

% handles    structure with handles and user data (see GUIDATA)

Th_1 = str2double(handles.Theta_1.String)*pi/180;

Th_2 = str2double(handles.Theta_2.String)*pi/180;

Th_3 = str2double(handles.Theta_3.String)*pi/180;

L_1 = 20;

L_2 = 50;

L_3 = 40;

L(1) = Link([0 L_1 0 pi/2]);

L(2) = Link([0 0 L_2 0]);

L(3) = Link([0 0 L_3 0]);

Robot = SerialLink(L);

Robot.name = 'Robot';

Robot.plot([Th_1 Th_2 Th_3]);

T = Robot.fkine([Th_1 Th_2 Th_3]);

handles.Pos_X.String = num2str(floor(T(1,4)));

handles.Pos_Y.String = num2str(floor(T(2,4)));

handles.Pos_Z.String = num2str(floor(T(3,4)));

[Geoff Hayes]

Ken - what is Link? I'm guessing it is a function of some kind where you input an array of four elements, but it is unclear what the output will be. (Or how even L is used after that.) Is Link a custom function that can be found within the MATLAB search path?

Answer 1

[dulith chinthaka]

you need to download robotic Toolbox library that is the reason for this error.

http://petercorke.com/wordpress/toolboxes/robotics-toolbox

Answer 2

[Nabil12347]

hello please help me i downloaded toolbox on the site petercorke i run it normal but the problem the function Link () does not run with MATLAB that i have 2017 however that toolbox i have download is 2015 answer me as soon as possible