Hi,
On Tue, Jul 23, 2013 at 10:11:04AM -0500, Engin Ozkan wrote:
> Isn't the reported Mean(I/sigI) in the reported Aimless table for
> the merged/averaged reflections (because that is what we are
> discussing about)?
Yes - according to
1. http://ccp4wiki.org/~ccp4wiki/wiki/index.php?title=Symmetry%2C_Scale%2C_Merge#Analysis_by_resolution
"... the average signal/noise after averaging symmetry-related
observations < <I>/σ(<I>) >, labelled Mn(I)/sd(Mn(I)) in the
Aimless table, ..."
2. section 3.2.1 of http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3689523/
"... from the average signal-to-noise ratio of the merged
intensities as a function of resolution. ... the average intensity
over symmetry mates <I h> is divided by its estimated error σ(<I>)
and this ratio is averaged in resolution bins [reported as Mn(I/sd)
in the program output].
So the average (denoted by < and > in the output) is over all unique
reflections within a resolution bin - after all, those stats are
reported within resolution bins. And each unique reflection is the
result of (weighted) merging of all its measurements.
... as far as I understand this ...
Cheers
Clemens
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