How can I draw a circle in matlab using parametric ecuations or the circle ecuation?

I need this for my homework and I managed to do it but the end result wasn't that smooth. Can somebody give me a simple, short code that gets the job done?

Answer 1

[Youssef Khmou]

hi, correct the word 'ecuations' for future searching. Parametric method is the easiest one :

 t=0:0.1:2*pi;
 x=cos(t);
 y=sin(t);
 plot(x,y);

Answer 2

[Image Analyst]

Code examples are in the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F Increase the number of samples if you want a smoother circle.