How to pass a value to a function which is external to GUI?

I have designed a program to calculate values and display graphs using multiple functions and global variables. the code works very fine. Now i want to add a GUI to make it more user friendly but cannot pass values and strings into the functions that are external to the GUI. Am using a pushbotton to invoke the function and pass values to it.

My Push button callback looks like this:

function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

Any method on how to go by this?

Answer 1

[Walter Roberson]

What constraints are blocking passing values in to the external functions? Do the external functions not take parameters ?

[Philip]

Thank you. They do take parameters. This is the how i passed the values from the GUI push button using a switch

function pushbutton1_Callback(hObject, eventdata, handles)

% declaring global functions
global patchr_config;
global design_patchr;
global rect_array;
global patchr;

    % passing variables from other functions in de same GUI
  Ny = get(handles.yNum,'Value');
  Nx = get(handles.xNum,'Value');
  Sy = str2double(get(handles.ySpacing,'String'));
  Sx = str2double(get(handles.xSpacing,'String'));
  Er = str2double(get(handles.dConstant,'String'));
  h = str2double(get(handles.thickness,'String'));
  freq1 = str2double(get(handles.freq,'String'));
  freq_config = freq1 * 1e6; %mutiplying by Mega Hertz

    Ang = 0; % Initialize Ang to 0

Pattern = get(handles.geom, 'Value'); % obtaining value from 'geom' function

% the switch function

     switch Pattern
        case 1
            patchr_config = design_patchr(Er,h,freq_config);
            rect_array(Nx,Ny,Sx,Sy,'patchr',Ang); % Define Square array
     ....

My error message after running the GUI and imputing the various parameters:

Attempted to access design_patchr(1,3,1.222e+09); index out of bounds
because size(design_patchr)=[0,0,1].

Error in Planer>pushbutton1_Callback (line 236)
            patchr_config = design_patchr(Er,h,freq_config);

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

Error in Planer (line 43)
    gui_mainfcn(gui_State, varargin{:});

Error in
@(hObject,eventdata)Planer('pushbutton1_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

[Walter Roberson]

Like it says, your index is out of range. Are you sure you want to be indexing the array design_patchr with a third index that is in the range of millions ? Or are you expecting that design_patchr is a function handle?

Where did you initialize design_patchr? In that routine did you remember to declare design_patchr as global ?

[Philip]

Thank you Walter.

design_patchr is a function which I have initialized outside the GUI as global. It receives (Er,h,freq_config) and does some other computations and returns the value to another function called patchr_config which also does some computations and returns values to another function.

Maybe I am not getting your queries right. But is it possible to pass values to an external function that is of itself global?

I learnt about GUIdata but don't know how to incorporate it into the programe

[Philip]

But the other option I was thinking about is to run the main m.file from the push button.

How about that also?