MATLAB创建两个x轴的图表:如何对齐它们？

Question

我正在尝试使用两个不同的x轴来绘制一个函数。正如你在图像中看到的，轴没有正确重叠！

我该如何修复它？我已经设置了在两个轴上有相同数量的刻度，但它没有帮助！

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这是我使用的代码：

ax1 = gca;
set(gca, 'box', 'off')
xlabel('Frequency shift, \Delta\omega (/THz)');
ylabel('Autocorrelation, F_{2}');
ylim([0.0,1]);
xlim([0, 10])

xlimits = get(ax1,'XLim');
ylimits = get(ax1,'YLim');
xinc = (xlimits(2)-xlimits(1))/5;
yinc = (ylimits(2)-ylimits(1))/5;
set(ax1,'XTick',[xlimits(1):xinc:xlimits(2)],...
        'YTick',[ylimits(1):yinc:ylimits(2)])

ax1.XColor = 'b';
ax1.YColor = 'b';
ax1_pos =  ax1.Position;

ax2 = axes('Position',ax1_pos,...
    'XAxisLocation','top',...
    'YAxisLocation','right',...
    'Color','none');
ax2 = gca;
xlim([0, 2.5]) %in nm (note two pi)
ylim([0.0,1]);

xlimits = get(ax2,'XLim');
ylimits = get(ax2,'YLim');
xinc = (xlimits(2)-xlimits(1))/5;
yinc = (ylimits(2)-ylimits(1))/5;
set(ax2,'XTick',[xlimits(1):xinc:xlimits(2)],...
        'YTick',[ylimits(1):yinc:ylimits(2)])

xlabel('Wavelength shift, \Delta\omega(/nm)');
ylabel('Autocorrelation, F_{2}');

ax2 = gca;
%set(ax,'XMinorTick','on','YMinorTick','off')
ax2.FontSize = 15;
ax2.Box = 'on';
ax2.LineWidth = 2;
set(gca, 'box', 'off')


set(findall(gcf,'type','text'),'FontSize',15);

Answer 1

也许可以试试

ax1_pos = get(gca,'Position');
ax2 = axes('Position', [ax1_pos(1) (ax1_pos(2) - 0.5) ax1_pos(3) ax1_pos(4)]);