Creating multiple colorbars on y axis one under the other, on the same graph and on the same x-axis

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alexrecai 2022-9-25

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编辑： alexrecai 2022-9-29

Hi all,

I have a trouble regarding creating three different colorbars on y axis one under the other, on the same graph and on the same x-axis. So basically data1, data2, data3 will be my three data sets and they will be on the y-axis. On my x-axis I will have the time. I tried the subplot function, but I ended up with multiple graphs. But I want to show data1, data2, data3 on the same graph. I sketched roughly what I am trying to do and I will appreciate any help from you. Thank you in advance.

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Answer 1

Pravarthana P 2022-9-28

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Hi Engin Tarhan,

I understand that you are facing an issue while plotting multiple data sets on y-axis against same x-axis in the same plot as shown in the attached image.

In order to plot the y-axis horizontally you can use the “barh” MATLAB function.

To plot multiple data on y-axis in the same plot, the following workaround can be helpful:

%Example:   
    x = [1980 1990 2000];              
    y = [8 15 25; 30 35 40; 50 55 62]; % multiple y data set
    tiledlayout(1,1);
    ax2 = nexttile;
    barh(ax2,x,y,'stacked')   % Stacked

To add the color map with the plot colors:

   c1 = [0 0.4470 0.7410];
   c2 = [0.8500 0.3250 0.0980] ;
   c3 = [0.9290 0.6940 0.1250] ;
   c = [c1 ; c2; c3] ;
   colorbar;
   %x = minimum value 
   %y = maximum value
   colorbar('Ticks',[x,y],...
         'TickLabels',{'Min','Max'})
   colormap(c);    

For more information, kindly refer to the following links:

Horizontal bar graph - MATLAB barh (mathworks.com)

Colorbar showing color scale - MATLAB colorbar (mathworks.com)

I hope this helps you!

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alexrecai 2022-9-29

编辑：alexrecai 2022-9-29

Dear Pravarthana,

First of all thank you for your informative answer. But the thing I am trying to do is a bit different, where each horizontal bar on the y axis will be matrices with their time data (so A, B and C are 500x2 matrices where the first column is force and the second column is time), and the x axis on the graph will be the time data, not the values of the y vectors. Also, I am trying to do the horizontal bars as colorbars, where their color will change according to their value, and a reference colorbar like this: