Vectors of different length when using plot3.

Basically I want to do a 3D plot of 100 circles with different radii and on a new height plane(h) for each circle. The radius increase for each circle(constant increase) and h increase constantly.

I've never used plot3 before so this code is from the top of my head. I was thinking of using a for loop for both r and h as suggested below. But where should I begin the loop for h? In the beginning(just under r) or as below? And what does it mean that "vectors must be of same length". Which vector?

if true
% for r=1:1:100
    t=linspace(0,2*pi);
    x=r*cos(t);
    y=r*sin(t);
    for h=100:100:10000
      z=h;
      plot3(x,y,z)
    end
end

Answer 1

[Image Analyst]

You might want to rethink your parameters because it sort of looks like a mess with way too many circles on the screen, but anyway, run this:

for r=1:1:100
  t=linspace(0,2*pi);
  x=r*cos(t);
  y=r*sin(t);
  for h=100:100:10000
    z=h * ones(1, length(t));
    plot3(x,y,z);
    if r == 1 && h == 100
      hold on;
      % Enlarge figure to full screen.
      set(gcf, 'units','normalized','outerposition',[0 0 1 1]);
    end
    drawnow;
  end
end

[Snirisa Gödel]

Thank you, this looks much closer to what I had in mind. As you mentioned, this looks like a mess but I'm sure it's just a matter of changing parameters in this case. I appreciate it.

Answer 2

[dpb]

Why not try it and see if it's the effect desired?

From

doc plot3
...
 plot3(x,y,z), where x, y and z are three vectors of the same length, ...

Answer 3

[Roger Stafford]

Change the line

 plot3(x,y,z)

to

 plot3(x,y,repmat(z,1,size(t,2)))
 hold on