Use bar3 instead of bar to plot multiple data in Matlab

Question

I have 3 matrices A, B and C where each of them is of size 21x2. I use bar to plot each one separately. I'm wondering how I can plot the three together using bar3?

So using this code:

A=rand(21,2);
B=rand(21,2);
C=rand(21,2);
fig=figure();b1=bar(A);
fig2=figure();b2=bar(B);
fig3=figure();b3=bar(C);

will generate these three figures:

A:

enter image description here

B:

enter image description here

C:

enter image description here

And what I want to do is that I want them to be all the the same figure but plotted behind each other in the z direction to be something like this

What have you tried? This looks as easy as bar3(x,y) so I am assuming you have a problem somewhere else. Maybe the values of the data? Show us a MCVE. — Ander Biguri
– Ander Biguri, Commented Apr 24, 2015 at 8:40
@AnderBiguri thanks for your comment. What are x and y? I just have a 3 matrices of size 21x2 which I would normally plot them separately using bar. But now I don't know how to plot them separately but still in the same graph if you understand what I mean. — Tak
– Tak, Commented Apr 24, 2015 at 8:43
stackoverflow.com/help/mcve <- MCVE . Shows us some example! — Ander Biguri
– Ander Biguri, Commented Apr 24, 2015 at 8:46

Ander Biguri · Accepted Answer · 2015-04-24 09:36:42Z

1

The idea is to create new variables that contain all the data you want in each row intercalated with NaNs. Just that change gives you almost the solution.

for ii=1:size(A,1)
   A1((ii-1)*3+1)=A(ii,1);
   A1((ii-1)*3+2)=A(ii,2);
   A1((ii-1)*3+3)=NaN;

   B1((ii-1)*3+1)=B(ii,1);
   B1((ii-1)*3+2)=B(ii,2);
   B1((ii-1)*3+3)=NaN;

   C1((ii-1)*3+1)=C(ii,1);
   C1((ii-1)*3+2)=C(ii,2);
   C1((ii-1)*3+3)=NaN;
end

h=bar3(horzcat(A1',B1',C1'))

However, I am guessing that you also want to modify the colors. To do this, the idea is that you can get the colour data for each bar row using get(h(nrow),'Cdata').

with this trick and your own colormap you should be able to colour the bars independently. It is not straightforward, but where's the fun if its easy!

edited Apr 24, 2015 at 9:36

answered Apr 24, 2015 at 8:51

Ander Biguri

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9 Comments

Tak Over a year ago

Thanks for your answer. I've updated my question with examples and screenshots to show what I want to do, so if you could please have a look.

Ander Biguri Over a year ago

@shepherd So you have 6 data separated in 3 matries? That is confusing! Anyway, to be able to plot all of the 6 then do bar3(horzcat(A,B,C))

Tak Over a year ago

But this is not what I want. See in my screenshots how each of A, B and C has 21x 2bars(sticked together)? I want the same thing (not separated) but for the three of them. Do you understand what I mean?

Ander Biguri Over a year ago

@shepherd Aaahhh! thats Why a MCVE is needed! That explanation was completely absent before. Let me edit my question, if possible.

Tak Over a year ago

please let me know when you update your answer. Thank you in advance.

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