Hi,
is maybe this code what are you looking for?
x=-3:0.01:3;
y=NaN(size(x));
L=x<=-2;
y(L)=0;
L=x>-2 & x<0;
y(L)=x(L)+2;
L=x>=0 & x<2;
y(L)=-x(L)+2;
L=x>=2;
y(L)=0;
subplot(2,1,1)
plot(x,y,'b')
axis([-3,3,-1,3])
xlabel 't(sec)'
ylabel 'f(t)'
x=-3:0.01:3;
y=NaN(size(x));
L=x<=-1;
y(L)=0;
L=x>-1 & x<1;
y(L)=1;
L=x>=1;
y(L)=0;
subplot(2,1,2)
plot(x,y,'r')
axis([-3,3,-1,2])
xlabel 't(sec)'
ylabel 'g(t)'
I wish that helps you and good luck.
