It probably comes from having no equivalent reflections within the I+ or I- sets in that resolution bin
Phil
> On 1 Jun 2016, at 09:09, Sam Tang <[log in to unmask]> wrote:
>
> Hello again
>
> I am dealing with a P1 dataset with only 135 images collected. After scaling using Aimless, I got the following statistics:
>
> Overall InnerShell OuterShell
> Low resolution limit 54.30 54.30 2.72
> High resolution limit 2.60 9.01 2.60
>
> Rmerge (within I+/I-) 0.108 0.000 0.293
> Rmerge (all I+ and I-) 0.079 0.032 0.333
> Rmeas (within I+/I-) 0.152 0.000 0.415
> Rmeas (all I+ & I-) 0.111 0.045 0.471
> Rpim (within I+/I-) 0.108 0.000 0.293
> Rpim (all I+ & I-) 0.079 0.032 0.333
> Rmerge in top intensity bin 0.037 - -
> Total number of observations 38673 948 4771
> Total number unique 22963 507 2908
> Mean((I)/sd(I)) 7.7 19.9 2.1
> Mn(I) half-set correlation CC(1/2) 0.989 0.996 0.736
> Completeness 82.6 76.4 85.5
> Multiplicity 1.7 1.9 1.6
>
> The dataset is not a good one esp. considering the low multiplicity and completeness. Though, is it normal to see Rmerge, Rmeas and Rpim at innershell equals to 0.000? I have an impression that Rmerge goes up for bad datasets (radiation damage, high mosaicity, etc). But how do I interpret Rmerge of 0.000?
>
> Thanks again for your time and advice.
>
> Kind regards
>
> Sam
>
>
>
> Sam Tang
>
> Biochemistry Programme, School of Life Sciences, CUHK
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