from spectrum import data_two_freqs, pburg
p = pburg(data_two_freqs(), 7, NFFT=4096)
p.plot()
p = pburg(data_two_freqs(), 7, NFFT=4096, scale_by_freq=True)
p.plot()
from pylab import legend
legend(["un-scaled", "scaled by 2 pi df"])