Hi,
I don't think XDS generates an Rpim value, does it? The XDS CORRECT
strep provides the "old fashioned" Rsym (R-FACTOR) plus R-meas and Rmrgd-F.
The curves look all the same though
Fred.
Ed Pozharski wrote:
On Thu, 2011-03-03 at 16:02 +0100, Vellieux Frederic wrote:
For myself, I decide on the high resolution cutoff by looking at the
Rsym vs resolution curve. The curve rises, and for all data sets I
have
processed (so far) there is a break in the curve and the curve shoots
up. To near vertical. This "inflexion point" is where I decide to
place
the high resolution cutoff, I never look at the I/sigma(I) values nor
at
the Rsym in the high resolution shell.
Fred,
while your procedure is definitely more sophisticated than what I do,
let me point out that the Rsym is genuinely a bad measure for this, as
it depends strongly on redundancy. Does more robust measures (e.g.
Rpim) show similar "inflexion"? I suspect it will at least shift
towards higher resolution.
Cheers,
Ed.
