Creating multiple cylinders in different coordinates

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I want to create cylinders with similar diameters and heights at various locations in x,y coordinates.
Could you help me
Thank you.

Accepted Answer

Star Strider
Star Strider on 27 Feb 2024
Edited: Star Strider on 1 Mar 2024
Perhaps this —
[X,Y,Z] = cylinder(1,20);
cm = colormap(turbo(10));
figure
hold on
for k = 1:10
ofst = randi(9,2);
surf(X+2*ofst(1), Y+2*ofst(2), Z*5, 'FaceColor',cm(k,:))
end
hold off
grid on
axis('equal')
view(-27,30)
I set them to be different colours. If you wnat them all the same colour, just use:
surf(X+2*ofst(1), Y+2*ofst(2), Z*5)
instead.
EDIT — (1 Mar 2024 at 19:30)
In response to the rpoated request —
[X,Y,Z] = cylinder(9,20);
ofst = [0 0; 20 0; 10 20];
a = linspace(0,2*pi);
xc = 9*cos(a);
yc = 9*sin(a);
figure
hold on
for k = 1:size(ofst,1)
surf(X+ofst(k,1), Y+ofst(k,2), Z*65, 'FaceColor','g', 'EdgeColor','g', 'FaceAlpha',0.25)
plot3(xc+ofst(k,1), yc+ofst(k,2), 65*ones(size(a)), '-k', 'LineWidth',1)
plot3(xc+ofst(k,1), yc+ofst(k,2), 0*ones(size(a)), '-k', 'LineWidth',1)
end
hold off
grid on
axis('equal')
view(-27,30)
.

More Answers (2)

Aquatris
Aquatris on 27 Feb 2024
Not sure how you want them to look or what you need but here is one simple way
[X,Y,Z] = cylinder(2); % create X,Y,Z coordinates for a cyclinder with a radius 2
% define center positions
cycPos1 = [1 1 1];
cycPos2 = [4 4 4];
cycPos3 = [-3 -3 -3];
figure(1)
plotCyclinder(cycPos1,X,Y,Z)
plotCyclinder(cycPos2,X,Y,Z)
plotCyclinder(cycPos3,X,Y,Z)
% function that draws the cyclinders
function plotCyclinder(pos,X,Y,Z)
surf(pos(1)+X,pos(2)+Y,pos(3)+Z)
hold on
end
  1 Comment
sevgi
sevgi on 1 Mar 2024
I want to create three solid cylinder volumes with a radius of 9 mm and a height of 65 mm at positions [0 0 0], [20 0 0], [10 20 0].
After that, I want to examine the thermal situation in the case of natural convection by defining temperature to the surface. I want to make an unsteady solution.
Could you help me.
Thank you for your interest.

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Matt J
Matt J on 1 Mar 2024
Edited: Matt J on 1 Mar 2024
Using cylindricalFit() from this FEX download
centers={[0 0 0],[20 0 0],[10 20 0]};
for i=1:3
plot(cylindricalFit.groundtruth([],centers{i},9,65,[0,90]));hold on
end; hold off

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