Passing data from External function to main GUIDE function

Hi,

I've a function in GUIDE that goes:

% --- Executes on button press in plot2_push.
function plot2_push_Callback(hObject, eventdata, handles)
% hObject    handle to plot2_push (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
handles.time_sec2 = 1:size(handles.selected_file_table(:,'t'));
for i = 1:handles.count2;
    plot(handles.axes2, handles.time_sec2, table2array(handles.selected_file_table(:,handles.selected_varlist2.String(i))),'LineWidth',2);
    (handles.selected_file_table(:,handles.selected_varlist2.String(i))),'LineWidth',2);
    axes(handles.axes2); hold on
end
    grid(handles.axes2,'on');
    handles.axes2.XMinorGrid = 'on';
    handles.axes2.YMinorGrid = 'on';
    hold off

      set(handles.axes2,'Color',[0.87058824300766 0.921568632125854 0.980392158031464],...
      'XColor',[0 0 0],'YColor',[0 0 0],'ZColor',[0 0 0]);
      legend(handles.selected_varlist2.String,'Location','northoutside','Orientation','horizontal')
      linkaxes([handles.axes1,handles.axes2],'x')
      vertical_cursors1;

      guidata(hObject, handles);

In the last line, I'm calling an external function to plot cursors (by Jiro) that goes like this:

function vertical_cursors1

set(gcf, ...
   'WindowButtonDownFcn', @clickFcn, ...
   'WindowButtonUpFcn', @unclickFcn);

% Set up cursor text
allLines = findobj(gcf, 'type', 'line');
hText = nan(1, length(allLines));
for id = 1:length(allLines)
   hText(id) = text(NaN, NaN, '', ...
      'Parent', get(allLines(id), 'Parent'), ...
      'BackgroundColor', 'yellow', ...
      'Color', get(allLines(id), 'Color'));
end

% Set up cursor lines
allAxes = findobj(gcf, 'Type', 'axes');
hCur = nan(1, length(allAxes));
for id = 1:length(allAxes)
   hCur(id) = line([NaN NaN], ylim(allAxes(id)), ...    %%hCur are cursor lines
      'Color', 'black', 'Parent', allAxes(id));
end

     function clickFcn(varargin)
        % Initiate cursor if clicked anywhere but the figure
        if strcmpi(get(gco, 'type'), 'figure')
           set(hCur, 'XData', [NaN NaN]);                % <-- EDIT
           set(hText, 'Position', [NaN NaN]);            % <-- EDIT
        else
           set(gcf, 'WindowButtonMotionFcn', @dragFcn)
           [b, curtime1] = dragFcn();
           disp(b); disp(curtime1);           
        end
     end

     function [yall,xtime] = dragFcn(varargin)
        % Get mouse location
        pt = get(gca, 'CurrentPoint');
        % Update cursor line position
        xtime = pt(1);
        set(hCur, 'XData', [pt(1), pt(1)]);
        % Update cursor text
        yall = zeros(1,length(allLines));
        for idx = 1:length(allLines)        % allLines refering to each line
           xdata = get(allLines(idx), 'XData'); % the x points for line #idx
           ydata = get(allLines(idx), 'YData'); % the y points for line #idx
           if pt(1) >= xdata(1) && pt(1) <= xdata(end)
              y = interp1(xdata, ydata, pt(1));
              % disp(y)
              set(hText(idx), 'Position', [pt(1), y], ...
                 'String', sprintf('(%0.2f, %0.2f)', pt(1), y));
             yall(:,idx) = y;
           else
              set(hText(idx), 'Position', [NaN NaN]);
           end
        end
     end
     function unclickFcn(varargin)
        set(gcf, 'WindowButtonMotionFcn', '');
     end
end

I've tried to pass data of 'yall' to the main GUI function but to no avail. Can someone help me?

Thanks.

[Geoff Hayes]

James - how do you expect to use the yall data? Will you be collecting it an array? At which point will you then use this data? You can try saving it to the handles structure which would be accessible by the other callbacks. Please provide more context.

[James Ang]

Hi Geoff, sorry for the late reply.. (thought MW will send me an email if there're replies).

Anyways, I plan to display the 'yall' values on a table.

It's working now though, this is what I did (though I don't fully understand how data is passed between functions. I'll ask in another thread)

 function dragFcn(hObject, eventdata, handles)

        % Get mouse location
        handles.pt = get(gca, 'CurrentPoint');
        handles.pt(:,1) = round(handles.pt(:,1));

        % Update cursor line position - moving line across x position
        set(handles.hCur, 'XData', [handles.pt(1), handles.pt(1)]);

        % Update cursor text
        for idx = 1:length(handles.allLines)

           xdata = get(handles.allLines(idx), 'XData');
           ydata = get(handles.allLines(idx), 'YData');

           if handles.pt(1) >= xdata(1) && handles.pt(1) <= xdata(end)               
              y = interp1(xdata, ydata, handles.pt(1));              
              set(handles.hText(idx), 'Position', [handles.pt(1), y], ...
                 'String', sprintf('(%0.0f, %0.2f)', handles.pt(1), y));             
              handles.yall(idx,:) = y;               
           else               
              set(handles.hText(idx), 'Position', [NaN NaN]);             
           end

        end

        handles.diff_table.Data(:, handles.cursornumber) =  handles.yall;

        if handles.cursornumber >= 2                
            handles.diff_table.Data(:,3) = handles.diff_table.Data(:,2) - handles.diff_table.Data(:,1);
        else

        end

guidata(hObject, handles);