title: how to plot a 3d circle-filled with color in matlab
body: <p>I have a function that plots a circle in 3d if given the center the normal of the circle and the radius.the function uses the plot3 command.So i want to find a way to fill that circle with some color.Also i want the circle to be transparent(i think alpha command )</p>
  
  <p>Please help.</p>