colorarray = {[1,0.4,0.5],[0.5,1,0.7],[0.3,0.4,1]};

hold on

for idx = 2:size(Daten,2)
    plot(Daten(:,1),Daten(:,idx),'linestyle','none','linewidth',1.5,'marker','.','markersize',5,'color',colorarray{1,idx-1});
end

stepsnum = datenum('2013-08-09 00:01:00','yyyy-mm-dd HH:MM:SS'):(datenum('2013-08-10 00:00:00','yyyy-mm-dd HH:MM:SS')-datenum('2013-08-09 00:01:00','yyyy-mm-dd HH:MM:SS'))/4:datenum('2013-08-10 00:00:00','yyyy-mm-dd HH:MM:SS');
stepsstr = datestr(stepsnum,'mm-dd HH:MM');
set(gca,'xtick',stepsnum);
set(gca,'XTickLabel',stepsstr);

hold off


zoomobj = zoom;
set(zoomobj,'ActionPostCallback',@TestFile2);
set(zoomobj,'Enable','on');