sector of a circle

i would like to write a function which draws a sector of a circle. the input argument being; the center of the circle , the sector angle and radiud. Any help ?

Answer 1

[Azzi Abdelmalek]

x0=2;
y0=3;
r=10; % radius
angl=3*pi/4;
angl=rem(angl,2*pi);
  if angl<=pi
      x=r*cos(angl):0.01:r+x0;
      y1=sqrt((r^2-(x-x0).^2))+y0;
      plot(x,y1)
  else
      x=-r:0.01:r+x0;
      y1=sqrt((r^2-(x-x0).^2))+y0;
      plot(x,y1);
      hold on
      x2=-r:0.01:-r*cos(angl-pi)+x0;
      y2=-sqrt((r^2-(x2-x0).^2))+y0;
      plot(x2,y2);
  end
  xlim([x0-r x0+r])
  ylim([y0-r,y0+r])
  axis square

Answer 2

[David Sanchez]

sector_end = your_value_here;
r = radious;
t=0:.01:sector_end;
x=r*cos(t);
y=r*sin(t);