matlab中的3个x轴图？

2 回答

• 3

  如this answer所示，您可以创建一个高度接近零的新 axes 对象，因此它基本上只是x轴 . 请注意，所有实际绘图必须在第一个轴上完成，因为这是您可以看到的区域！

  演示代码：

  % Create some plotting data and plot
  x = 0:0.1:2*pi;   y = sin(x);
  % Plot, can specify line attributes (like LineWidth) either 
  % - inline: plot(x,y,'linewidth',2)
  % - after: p1 = plot(x,y); p1.LineWidth = 2;
  plot(x,y);
  % Get current axes object (just plotted on) and its position
  ax1 = gca;
  axPos = ax1.Position;
  % Change the position of ax1 to make room for extra axes
  % format is [left bottom width height], so moving up and making shorter here...
  ax1.Position = axPos + [0 0.3 0 -0.3];
  % Exactly the same as for plots (above), axes LineWidth can be changed inline or after
  ax1.LineWidth = 2;
  % Add two more axes objects, with small multiplier for height, and offset for bottom
  ax2 = axes('position', (axPos .* [1 1 1 1e-3]) + [0 0.15 0 0], 'color', 'none', 'linewidth', 2);
  ax3 = axes('position', (axPos .* [1 1 1 1e-3]) + [0 0.00 0 0], 'color', 'none', 'linewidth', 2);
  % You can change the limits of the new axes using XLim
  ax2.XLim = [0 10];
  ax3.XLim = [100 157];
  % You can label the axes using XLabel.String
  ax1.XLabel.String = 'Lambda [nm]';
  ax2.XLabel.String = 'Velocity [m/s]';
  ax3.XLabel.String = 'Energy [eV]';
  

  输出：

  

  ---

  Edit ：
  在2014b graphics changes之前，您需要进行一些调整以获取和设置轴属性 . 等效代码会更多地使用 set 命令，看起来像这样：

  x = 0:0.1:2*pi;   y = sin(x);
  plot(x,y);
  ax1 = findobj(gca, 'type', 'axes')
  axPos = get(ax1, 'Position');
  set(ax1, 'Position', axPos + [0 0.3 0 -0.3]);
  set(ax1, 'LineWidth', 2);
  ax2 = axes('position', (axPos .* [1 1 1 1e-3]) + [0 0.15 0 0], 'color', 'none', 'linewidth', 2);
  ax3 = axes('position', (axPos .* [1 1 1 1e-3]) + [0 0.00 0 0], 'color', 'none', 'linewidth', 2);
  set(ax2, 'xlim', [0 10]);
  set(ax3, 'xlim', [100 157]);
  axes(ax1); xlabel('Lambda [nm]');
  axes(ax2); xlabel('Velocity [m/s]');
  axes(ax3); xlabel('Energy [eV]');
  

  回复于 2024-05-03T16:08:17+08:00
• 1

  以下是如何执行此操作的示例：

  msx = [1 50 60 90];
  msy = [0 1 3 8];
  
  lx = 90/4*[1 2 3 4]; % Scale the data with respect to the data that will use the "primary" X-axis
  ly = [0 2 8 10];
  
  evx = 90/19*[1 7 10 19]; % Scale the data with respect to the data that will use the "primary" X-axis
  evy = [0 8 16 20];
  
  figure
  a=axes('units','normalized','position',[.1 .35 .7 .6],'xlim',[0 100],'xtick',0:10:100);
  plot(lx, ly)
  hold on
  plot(msx, msy)
  hold on
  plot(evx, evy)
  xlabel(a,'velocity m/s')
  b=axes('units','normalized','position',[.1 .21 .7 0.000001],'xlim',[0 4],'color','none', 'xtick',0:1:10);
  xlabel(b,'lambda nm');
  c=axes('units','normalized','position',[.1 .10 .7 0.000001],'xlim',[0 19],'color','none', 'xtick',0:1:19);
  xlabel(c,'energy eV');
  

  对于position：指定为[left bottom width height]形式的四元素向量 . 默认值[0 0 1 1]包括容器的整个内部 . （见https://de.mathworks.com/help/matlab/ref/axes-properties.html）

  输出数字：
  

  回复于 2024-05-03T16:08:17+08:00