How to add a cylinder to a scattered plot

Hello everyone,

I currently have a 3D data plot which I will like to superimpose with a cylinder.

Here is my current code:

%clear all;
%close all;
clc

A = load ('Data.txt');
x = A (:,1 ) ;
y = A (:,2 ) ;
z = A (:,3 ) ;
Amplitude = A (:,4) ; 
scatter3 (x , y, z, 30, Amplitude )
title ('Cylinderical Sample')
xlim ([-0.07 0.07])
ylim ([-0.09 0.09])
zlim ([0 0.10])
xlabel ('Breath /m')
ylabel ('Width /m')
zlabel ('Height /m')
pbaspect([1 1 2])
H = colorbar ;
ylabel (H, 'Amplitude')

And results:

My challenge is that should i try to include a cylinder, I lose seeing the points in my scattered plot.

Here is the code I prepared to include the cylinder:

%clear all;
%close all;
clc

A = load ('Data.txt');
x = A (:,1 ) ;
y = A (:,2 ) ;
z = A (:,3 ) ;
Amplitude = A (:,4) ; 
r = 0.025;
scatter3 (x , y, z, 30, Amplitude);
[X,Y,Z] = cylinder(r);
surf (X,Y,Z);
title ('Sample - VS 126')
xlim ([-0.07 0.07])
ylim ([-0.09 0.09])
zlim ([0 0.10])
xlabel ('Breath /m')
ylabel ('Width /m')
zlabel ('Height /m')
pbaspect([1 1 2])
H = colorbar ;
ylabel (H, 'Amplitude')  

And here is how I have the results now:

Top View of Results:

Is it possible that I can get some assistance with including the cylinder into the scattered plot?

Thank you.

--

Greek

Answer 1

[Chunru]

% A = load ('Data.txt');
A = 0.05*rand(8, 4)

A = 8×4

0.0364 0.0250 0.0031 0.0097 0.0023 0.0306 0.0495 0.0304 0.0439 0.0292 0.0324 0.0319 0.0186 0.0394 0.0206 0.0185 0.0172 0.0416 0.0133 0.0249 0.0058 0.0326 0.0139 0.0158 0.0161 0.0404 0.0307 0.0112 0.0358 0.0139 0.0391 0.0407

x = A (:,1 ) ;
y = A (:,2 ) ;
z = A (:,3 ) ;
Amplitude = A (:,4) ; 
scatter3 (x , y, z, 30, Amplitude )
title ('Cylinderical Sample')
xlim ([-0.07 0.07])
ylim ([-0.09 0.09])
zlim ([0 0.10])
xlabel ('Breath /m')
ylabel ('Width /m')
zlabel ('Height /m')
pbaspect([1 1 2])
H = colorbar ;
ylabel (H, 'Amplitude')
hold on
r = 0.025;
[X,Y,Z] = cylinder(r);
surf (X,Y,Z, 'EdgeColor', 'none', 'FaceAlpha', 0.2);

[Greek McCoy]

Hello Chunru,

Thank you very much for your brilliant input.

Your answer works perfectly.

Is there any way I can seal the top and bottom ends of the cylinder?

--

Sincerely,

Greek