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Hello Dan--

> I have a problem understanding the results of the covariance analysis.
> Does anyone have the exact algorithm for this analysis, not just the
> formula. Is there a reference for that?
> 
> My understanding is that when 2 atoms for example are highly
> correleated that means that they move with the same interval from the
> average structure or they dont move at all but there is no direction
> involved in the correlation so I cant say that thier movement are
> correlated, dont I??
> 

While true that this displacement correlation function is different than
a velocity correlation function, I expect that the two functions should
be similar. What is not so clear from the manual entry is that the
displacement is a vector quantity (with direction) - so the covariance
entries can be signed. 

hope this helps--
Charles
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