Matlab - Dibujar rostro en matlab

http://www.mathworks.com/help/matlab/ref/annotation.html

%Programa para hacer una cara feliz

%Que debe tener usted al terminar el curso

clear,clf,hold off

dt=pi/20

t=0:dt:2*pi

x=cos(t);y=sin(t);

axis('off'),hold on

plot(x,y)

hold on

for k=0.8:-0.05:0.05

plot(k*0.1*x-0.3,k*0.15*y+0.1)

plot(k*0.1*x+0.3,k*0.15*y+0.1)

end

s1=3*pi/2-1.1;

s2=3*pi/2+1.1

s=s1:dt:s2;

xs=0.5*cos(s);ys=0.5*sin(s);

plot(xs,ys)

hold off

clc,

close all

clear,

clf,

hold off

dt=pi/20;

t=0:dt:2*pi;

x=cos(t);

y=sin(t);

axis([-1 1 -1 1]),

hold on

plot(x,y) %contorno cara

hold on

axis ('square')

for k=1:-.05:.1

    plot(k*.3*x-.3,k*0.20*y+.1) %ojo izquierdo

    plot(k*.25*x+.3,k*0.15*y+.1) %ojo derecho

end

s1=3*pi/2-1.1;

s2=3*pi/2+1.1;

s=s1:dt:s2;

xs=.5*cos(s);

ys=.5*sin(s);

plot(xs,ys) %boca

x1=-.5:.1:.5;

y1=-0.2;

plot(x1,y1)

hold off

figure(2)

clear,

clf,

hold off

dt=pi/20;

t=0:dt:2*pi;

x=cos(t);

y=sin(t);

axis([-1 1 -1 1]),

hold on

plot(x,y,'k') %contorno cara

hold on

axis ('square')

text(.2,.2,'O','FontSize',[80],'Color','b'),

text(.3,.2,'O','FontSize',[20],'Color','g') %ojo derecho 

text(-.5,.2,'O','FontSize',[80],'Color','b'),

text(-.4,.2,'O','FontSize',[20],'Color','g') %ojo izquierdo

text(-.1,-.1,'U','FontSize',[30],'Color','k') %nariz 

x1=-.5:.01:.5; y1=(x1.^2)-.5;

plot(x1,y1,'+k') %sonrisa 

for i=.8:.001:1.1 %cabello 

    x2=-.95:.01:.95;

    y2=-.5*x2.^2+i;

    plot(x2,y2,'y')

end