Function on separate intervals

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Nader Mohamed
Nader Mohamed on 30 Oct 2021
Edited: David Hill on 30 Oct 2021
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

Accepted Answer

David Hill
David Hill on 30 Oct 2021
Edited: David Hill on 30 Oct 2021
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

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R2018b

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