Plot two sets of data in one plot (different Time vs Temp data sets)

Hi,

I have two sets of data (Time vs Temperature) and I would like to overlay the two plots to compare the behaviour.

I am having difficulty getting the right code. Either, I can plot both lines but only one set of x-y axis or I can plot both sets of x-y axis but only one line (it loses the first set of data).

As a new Matlab user, this feels like a basic task but I am struggling to find any clear answer on it. Can anyone help?

This gives me one x-y axis (ax1) but both lines on the plot.

figure('WindowState','maximized');
    plot(x1, A1, 'LineWidth', 1);    
    set(gcf, 'Position', [100 100 1000 550]);
    ax1 = gca;
    pos = get(ax1, 'Position');
    set(ax1, 'Position', pos, 'XAxisLocation', 'top', 'YAxisLocation', 'right');
    hold(ax1,"on");
    ax2 = axes('position',pos,'color','none');
    plot(x2, A4, 'k','parent',ax2, 'LineWidth', 1);
    set(ax2,'visible','off');
    legend;

This gives me two x-y axis but only one line (plot two). I am aware that this is tied to the Visibility of ax2 but I am not sure how to proceed.

figure('WindowState','maximized');
    plot(x1, A1, 'LineWidth', 1);    
    set(gcf, 'Position', [100 100 1000 550]);
    ax1 = gca;
    pos = get(ax1, 'Position');
    set(ax1, 'Position', pos, 'XAxisLocation', 'top', 'YAxisLocation', 'right');
    hold(ax1,"on");
    ax2 = axes('position',pos,'color','none');
    plot(x2, A4, 'k','parent',ax2, 'LineWidth', 1);;
    legend;

Thank you in advance!

[Jiri Hajek]

Maybe this could help?

[Matt R]

Hi Jiri,

Thanks for the comment. However, I am unable to use yyaxis as my x-axis are two different data sets of time that I want to overlay.

Answer 1

[VBBV]

% figure('WindowState','maximized');
x1 = 1:10; A1 = rand(10,1);
x2 = 1:10; A4 = rand(10,1);
    plot(x1, A1, 'LineWidth', 1);    
    set(gcf, 'Position', [100 100 1000 550]);
    ax1 = gca;
    pos = get(ax1, 'Position');
    set(ax1, 'Position', pos, 'XAxisLocation', 'top', 'YAxisLocation', 'right');
    hold(ax1,"on");
    ax2 = axes('position',pos,'color','none');
    plot(x2, A4, 'k','parent',ax2, 'LineWidth', 1);
    set(ax2,'visible','off');
    legend;

    
% F =   figure('WindowState','maximized')
    h1 =  plot(x1, A1, 'LineWidth', 1);    
    set(gcf, 'Position', [100 100 1000 550]);
    ax1 = gca;
    pos = get(ax1, 'Position');
    set(ax1, 'Position', pos, 'XAxisLocation', 'top', 'YAxisLocation', 'right');
    hold(ax1,"on");
    ax1.NextPlot = 'add'   

ax1 = 
  Axes with properties:

             XLim: [1 10]
             YLim: [0 0.9000]
           XScale: 'linear'
           YScale: 'linear'
    GridLineStyle: '-'
         Position: [0.1300 0.1100 0.7750 0.8150]
            Units: 'normalized'

  Show all properties

%     ax2 = axes('position',pos,'color','none');
    h2 = plot(x2, A4, 'k','parent',ax2, 'LineWidth', 1);
    ax2 = gca;   
    set(ax2,'visible','off');
    legend;

[VBBV]

Use the NextPlot property of the axes handle. and set the axes visibility of 2nd plot to off

ax1.NextPlot = 'add' 

[Matt R]

Hi VBBV,

Thanks for the detail, however, your result is the same as my first result in the question (one x-y axis and tow lines). In other words, I want the second axis to be visible.

[VBBV]

set(ax1,'visible','off');

Then you can set the first axes ax1 to off. instead of

 set(ax2,'visible','off');

If you want both axes, the resulting figure will become blurred with overlapped axes