how to pass the matrix value outside the loop

I need to pass the matrix value of 'xd' outside the loop.

% display all the blocks.
plotIndex = 1;
numPlotsR = size(ca, 1); 
numPlotsC = size(ca, 2); 
for r = 1 : numPlotsR
  for c = 1 : numPlotsC
    subplot(numPlotsR, numPlotsC, plotIndex);
    rgbBlock = ca{r,c};
    %find the different pixel intensity
    maxi= max(rgbBlock(:))
    mini= min(rgbBlock(:))
    diff = maxi - mini
    if diff >= 150
      fprintf('Hard Region\n')
      n = 4;                   % Decomposition Level
      w = 'db4'            
      x = rgbBlock;
      [c l] = wavedec2(x,n,w); % Multilevel 2-D wavelet decomposition.
      opt = 'gbl'; % Global threshold
      thr = 20;    % Threshold
      sorh = 'h';  % Hard thresholding
      keepapp = 1; % Approximation coefficients cannot be thresholded
      [xd,cxd,lxd,perf0,perfl2] = wdencmp(opt,c,l,w,n,thr,sorh,keepapp);
      image(xd)    % xd is a matrix, I want to pass the ...
                    'xd' value out from this loop
    else if diff < 150
      fprintf('soft Region\n')
    else
      fprintf('Out of Region\n')
    end
  end
  [rowsB columnsB numberOfColorBandsB] = size(rgbBlock);
  plotIndex = plotIndex + 1;
end

TQ friend... :)