Turning part circle into circle segment

Question

Klaus Haas 2015-4-22

编辑： pfb 2015-4-22

Hi,

i got a part of a circle like this

n = 60;
% the circle "Kreis" in the xy-plane:
v = linspace(pi/4,7*pi/4 , n);
r = 60;
Kreis = [r*cos(v)+60; 
      r*sin(v); 
      0*v] ;

How can I close the circle with a straight line without adding an extra "object", so that the whole circle segment is "Kreis" in the end?

greets

Answer 1

pfb 2015-4-22

编辑：pfb 2015-4-22

I'd add a final point coincident with the first one

Kreis=[Kreis Kreis(:,1)];

Then

plot3(Kreis(1,:),Kreis(2,:),Kreis(3,:))

or

fill3(Kreis(1,:),Kreis(2,:),Kreis(3,:),'b');

give the figure you're asking for.

You can do this also by redefining the grid as

v = [linspace(pi/4,7*pi/4 , n) pi/4];

(no need of adding the extra point, now)