z=15;


xframe=6;
yframe=5;

for j=1:varnum
  var=reshape(mem(:,j,:),[nx ny nz nens]);
  figure(j);
  for i=1:nens
    subplot(yframe,xframe,i);
    imagesc(var(:,:,z,i));colorbar;
    title(sprintf('%s%i','member ',i));
  end
end