x = -2*pi:0.1:2*pi;
hold all
subplot(2,3,1)
plot(sin(x), sin(x+pi/2))
subplot (2,3,2)
plot(sin(x),sin(x+pi/4))
subplot (2,3,3)
plot(sin(x),sin(x))
subplot(2,3,4)
plot(sin(x),sin(x+3*pi/4))
subplot (2,3,5)
plot(sin(x),sin(x+3*pi/4))
subplot(2,3,6)
plot(sin(x),sin(x+2*pi))