删除x-asx上的左/右空间

如何删除x-asix上的左/右空间。

hold all
set(gcf,'color','w')
L1=min(ndata_(:,1));
L2=max(ndata_(:,1));
plot(ndata_(:,1),ndata_(:,2))

NumTicks = 20;
L = get(gca,'XLim');
set(gca,'XTick',linspace(L1,L2,NumTicks))
datetick('x',13,'keeplimits', 'keepticks')
xticklabel_rotate;
set(gca,'XMinorTick','on','YMinorTick','on')
ylim([-0.2 .2])
grid on
hold off

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41582.3596844560    0.0194999999999995
41582.3596849884    0.0194999999999995
41582.3596855324    0.0194999999999995


]

从文件交换下载了xticklabelrotate。