Issues with passing uitable handle to a function

Hello, I have 2 uitables that I want positioning using subplot notation hence:

ax1=subplot(2,2,1);
cnames={'x','ESF'};
% Create the uitable
t1 = uitable(f1,'Data',ESF',...
            'ColumnName',cnames,... 
            'ColumnWidth',{50});
ax1,plot(3); pos = get(ax1,'position'); delete(ax1)
set(t1,'units','normalized'); set(t1,'position',pos)

ax2=subplot(2,2,2);
cnames={'x','offset'};
% Create the uitable
t2 = uitable(f1,'Data',offsets,...
            'ColumnName',cnames,... 
            'ColumnWidth',{50});
ax2,plot(3); pos = get(ax2,'position'); delete(ax2)
set(t2,'units','normalized'); set(t2,'position',pos)

I also add a popup menu

   popup = uicontrol('Style', 'popup',...
             'String', {'ESF','Offsets'},...
             'Value',1,...
             'Position', [10 0 80 30],...
             'Callback',  @(src,evt) getAscii( src, evt,handles ));

Now depending on what the user selects, I want to copy the selected uitable contents to clipboard:

function getAscii(source,event,handles)

          %cla(ax);                
          val = source.Value;
          %indx = source.String;

          switch val

              case 1
                 disp('ESF') 
                 d=get(t1,'data')
              case 2    
                 disp('Offsets') 
                 d=get(t2,'data')

              otherwise
                 disp('None')  
          end        

%Copy to clipboard

size_d = size(d);
str = '';
for i = 1:size_d(1)
    for j = 1:size_d(2)
        if j == size_d(2)
            str = sprintf('%s%f',str,d(i,j));
        else
            str = sprintf('%s%f\t',str,d(i,j));
        end
    end
    str = sprintf('%s\n',str);
end
clipboard ('copy',str);

However, i'm not sure how to pass in the handles of ALL the uitable

[Rik]

In your callback, you need to load the handles struct with guidata. If you want to use it, you will first have to save data to it with guidata(handle_to_figure_or_child_object,handles)

[Stephen23]

Jason's "Answer" moved here:

OK I have tried :

t1 = uitable(f1,'Data',ESF',...
            'ColumnName',cnames,... 
            'ColumnWidth',{50});

guidata(t1);

then calling it still gives

Reference to non-existent field 't1'.

[Rik]

Have you read the doc for guidata?

[Geoff Hayes]

Jason - it looks like you have programmatically created your GUI, so why not nest your function and callbacks in the main function so that they have access to the variables (in this case the handles) declared in the main function? See Nested Functions for more details.

[Jason]

So I got the following working:

f1=figure
myhandles.table1 = t1; 
% Save the structure
guidata(f1,myhandles)

and then in my functionI can access the selected table contents as:

d=get(myhandles.table1,'data')

thanks Rik. Also Geoff, I will look into your suggestion also, thanks