Creating multiple cylinders in different coordinates

I want to create cylinders with similar diameters and heights at various locations in x,y coordinates.

Could you help me

Thank you.

Answer 1

[Star Strider]

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)

.

[sevgi]

thank you for your interest.

[Star Strider]

As always, my pleasure!

Answer 2

[Aquatris]

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

[sevgi]

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.

Answer 3

[Matt J]

Using cylindricalFit() from this FEX download

https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-to-fit-plot-conics-and-quadrics?s_tid=FX_rc2_behav

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