Phase Trellis Plot for Digital Communication Systems

Plotting given binary data into a Phase Trellis Plot. Code flexible for any limit of binary digits, and has limits -pi to pi.

Algorithm:

1) If input is 1, add pi/2 to the previous value and append to output if the output is above pi, else subtract by 2pi.

2) If input is 0, subtract pi/2 from the previous value and append to output if the output is below pi, else increase by 2pi.