If I have a periodic function piecewise, I could calculate THD Total Harmonic Distortion for it?

I have a periodic signal, but is built in piecewise, how could I calculate THD for this function?

Answer 1

[Wayne King]

The Signal Processing Toolbox has a function that will do that for you, thd()

thd() is new in R2013b.

[Luis Arteaga]

Thank you very much for the reply, in earlier versions of matlab, matlab 2011 for example I have the same chance or how I could do