Check empty & not empty of text box in GUI

Notchop and Compop are the output textbox of GUI

op_n = str2double(get(handles.Notchop, 'String'));

op_c = str2double(get(handles.Compop, 'String'));

if ~empty(op_n)&& isempty(op_c) %op_n is not empty and op_c is empty

disp('H')

elseif isempty(op_n) && ~empty(op_c) %op_n is empty and op_c is not empty

disp('Gc')

elseif ~empty(op_n) && ~empty(op_c) %op_n is not empty and op_c is not empty

disp('H *Gc')

end

it showing error

Undefined function 'empty' for input arguments of type 'double'.

Error in GUI3_4>step_Callback (line 417)

if ~empty(op_n)&& isempty(op_c)

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in GUI3_4 (line 42)

gui_mainfcn(gui_State, varargin{:});

Answer 1

[Voss]

replace empty with isempty