Notes for frequency step

1) Nexus format is 5 letters/numbers for name followed by tab

2) nex_mo.py remains unaltered

3) X.Aut.freq.spectra.py is modified as follows:

	Modify population assignments as show using excel or bbedit

	take last comma where it says to do so

	Change file ext to match nexus file

	Choose # in three places
		e.g. ['GeorHigh'], [20], polarized = False
		e.g. “.20.png"
		e.g. ‘.20.fs'

4) run by: python Pintail.High.Aut.freq.spectra.py

Error text with blank png file:

/opt/miniconda3/lib/python3.7/site-packages/dadi/Plotting.py:58: UserWarning: Data has no positive values, and therefore cannot be log-scaled.
  ax.semilogy(fs, '-ob')