MATLAB - piecewise defined Fn as periodic

[Apothus]

Homework Statement

We have been provided with a graph
of a function modeled by F(t)=a-aU(t-1)+(-3/2.5*t+4.2)U(t-1)-(-3/2.5*t+4.2)U(t-3.5)

I have entered this into MATLAB and it replicates the graph we have been provided with but we now need to extend this as an Even function.

 

[LCKurtz]

Can't you just use F(-t) = F(t)?

What are you going to do next with this function?