coherency

I just got 15 hits from 'RSiteSearch("cross spectrum")' and 12 from 
'RSiteSearch("coherency")'.  I doubt if all are relevant to your 
question, but the first in each list seems relevant.

	  If you would like further support from this list, I suggest you first 
review the "r-help" posting guide! 
"www.R-project.org/posting-guide.html".  I believe that people who 
follow that guide tend to get more useful replies quicker.

	  hope this helps,
	  Spencer Graves