./quasiparticleWeightZ -f file [-r mode]
Mode is optional and defaults to -1
If -1, then it does Eq.~(4) of Phys. Rev. B 47 14267 (1993)
else it does the previous calculation.

-r rootInputName  -n totalFiles -b begin -e end -s step -d delta

This script does the Fourier Transform (FT)
of files, each containing a continued fraction
of a pair of sites.
For now, it only works for a chain with
the center-site approximation

If a 3rd argument is present and positive then
the calculation is done for periodic boundary conditions

First Argument: Number of Sites (mandatory)
Second Argument: TwiceS (optional, default to 1, that is s = 1/2)