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.
>
>
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