Function on separate intervals

I'm trying to write a function that has different values on different intervals:

from t0 to t1 needs to be 0

from t1to t2 needs to be a segment that goes linearly from 0 to t1

from t2 to tf needs to be t2

But when I try the code below I get a totally different plot and can't find the error(s).

t0 = 0;
t1 = 1;
t2 = 1.5;
tf = 3;



function z = funz(t,t0,t1,t2,tf)

    zz = @(t) ((t2-t1)/(t2-t1))*t;
    
    if (t<t1 & t>t0)
        z = zz(0);
    elseif (t<t2 & t>t1)
       z = zz(t);
    else
        z = t1;
    end
    
end

Answer 1

[David Hill]

t=0:.01:3;%the start and stop of t defines t0 and tf
t1 = 1;
t2 = 1.5;
z=funz(t,t1,t2);
plot(t,z);

function z = funz(t,t1,t2)
   z=zeros(size(t));
   z(t>t1&t<t2)=(t(t>t1&t<t2)-t1)*t1/(t2-t1);
   z(t>=t2)=t1;
end