In a GUI, How do I accept user input and turn string into a function? ex. 3*x^2 +2*x -5

% --- Executes on button press in Graph.

function Graph_Callback(hObject, eventdata, handles)

syms x y;

userInput = get(handles.user1,'String');

fun = @(x) userInput;

x=0:10;

y = fun(x);

axes(handles.axes1);

plot(x,y);

xlabel('x'); ylabel('y');

guidata(hObject,handles);

Answer 1

[Walter Roberson]

   fun = str2func( ['@(x)' userInput])