clear all; close all;

x=-10:0.1:10;
x2=[-5 -sqrt(3) pi];
x3=linspace(-10,10,64);

y=sin(x);
y2=sin(x2);
y3=x3.*sin(x3);

figure(1)
plot(x,y), hold on
plot(x2,y2)
plot(x3,y3)

figure(2)
plot(x,y,x2,y2,'*',x3,y3,'mO:')
legend('y','y2','y3',0)
xlabel('x axis'), ylabel('y axis')
title('stuff')
grid on

figure(3)
subplot(3,1,1), plot(x,y)
  axis([-10 10 -10 10])
subplot(3,1,2), plot(x2,y2,'*')
  axis([-10 10 -10 10])
  title(['this is the point (' num2str(x2(1)) num2str(y2(1)) ')'] )
subplot(3,1,3), plot(x3,y3,'mO:')