MATLAB Answers

How to 3D plot a circle with radius of 1 in x y and sine wave in z?

8 views (last 30 days)
Hwajin Choi
Hwajin Choi on 6 Apr 2021
Commented: Hwajin Choi on 6 Apr 2021
Hello,
I want to 3D plot a circle looks like the image below. (Sorry for the poor drawing) The figure is a circle of radius 1 in xy surface and the circle should have a sine wave in z-direction. It's exactly same shape with pringles chip.

Accepted Answer

Michael
Michael on 6 Apr 2021
Try this:
%Position of center of chip in 3D space
x0 = 1;
y0 = 1;
z0 = 1;
r = 1;%Radius of chip
d_theta = 2*pi/60; %Differential Angle
th = 0:d_theta:2*pi; %Angle Vector
height = 0.5; %Height of wave in the chip
% Create the x, y, and z positions
x = x0+r*cos(th);
y = y0+r*sin(th);
z = z0+height*sin(2*th);
plot3(x,y,z)
grid on
axis equal

More Answers (1)

William
William on 6 Apr 2021
How about this:
theta = linspace(0,2*pi,100);
x = sin(theta);
y = cos(theta);
z = sin(2*theta);
figure();
plot3(x,y,z);
  1 Comment
Hwajin Choi
Hwajin Choi on 6 Apr 2021
Thank you for your help, William. It's nice simple and neat code. Although I cannot accept your answer because I already accepted another one, I would like to vote yours. Thank you!

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by