Attempt to reference field of non-structure array

i am trying to display the values obtained by a variable h_dist in the edit text field but it is showing me the below error

My code is set(handles.edit1,'String',num2str(h_dist1)); set(handles.edit2,'String',num2str(h_dist2)); set(handles.edit3,'String',num2str(h_dist3));

the error is

Attempt to reference field of non-structure array.

Error in LBPFeature>TestingLBP_Callback (line 268) set(handles.edit1,'String',num2str(h_dist1));

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in LBPFeature (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)LBPFeature('TestingLBP_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

what do i do to display the values in the edit text box. im new to matlab so please help me

[Geoff Hayes]

Which of the three lines is generating the error? Or is it some other line?

set(handles.edit1,'String',num2str(h_dist1)); set(handles.edit2,'String',num2str(h_dist2)); set(handles.edit3,'String',num2str(h_dist3));

The error message indicates that the code is trying to access a field (via the period) of a non-structure array. So in the above three lines of code, the potential error is due one of the three handles.edit1/2/3 accesses. You should put a breakpoint at the first of these three lines, and re-run the code until it pauses here. Look at the handles structures - does it have fields names edit1, edit2, and edit3? Is the structure empty? Are these the names of your edit boxes, or have their Tags changed?