Dear Chen,

you should only exclude resolution ranges when you actually have
ice-ring contamination in your data: did you decide on that by hand or
is it based in your case on some automatic analysis? If you have this
situation then the completeness will indeed go down - after all, there
are possible reflections that you didn't observe (since you excluded
the resolution ranges these reflections they occur in).

If you are worried about this, you could e.g. try the automatic
detection and treatment of ice-rings during processing in
e.g. autoPROC (see [1] and [2]): it will only exclude ice-ring
resolution ranges that are detected and it will use an excluded
resolution range as narrow as possible/necessary to avoid rejecting
otherwise good data when processing data in XDS.

Cheers

Clemens

[1] www.globalphasing.com/autoproc/
[2] www.globalphasing.com/autoproc/manual/autoPROC7.html#step1_spotnohkl



On Fri, Jul 20, 2018 at 10:49:48AM -0400, CPMAS Chen wrote:
> Hi, All CCP4 users,
> 
> This might be a  little off-topic, but I cannot find a mail list for XDS.
> During XDS processing, we can exclude the resolution range to "remove" ice
> ring.
> In my case, when I excluded these range, the completeness at this range
> will be much lower, ~45%.
> N  1/d^2    Dmid    Nmeas     Nref    Ncent  %poss C%poss Mlplct   AnoCmp
> AnoFrc AnoMlt   $$ $$
>   16  0.0582   4.15    25565     4013       54   95.2   98.9    6.4
>  94.6   99.2    3.2
>  17  0.0619   4.02    26217     4167       54   95.6   98.6    6.3
>  94.7   99.0    3.2
>  18  0.0657   3.90    11393     1973       23   44.4   94.2    5.8
>  41.2   92.5    3.1
>  19  0.0694   3.79    31643     4556       60   99.0   94.6    6.9
>  98.7   99.7    3.5
>  20  0.0732   3.70    14014     2149       30   45.4   90.9    6.5
>  43.7   96.1    3.4
>  21  0.0769   3.61    29456     4242       57   87.5   90.7    6.9
>  86.1   98.4    3.5
>  22  0.0807   3.52    35722     4940       61   99.3   91.3    7.2
>  99.2   99.8    3.6
> 
> If I included these resolution range, the completeness is more than 90%.
> However, when look at the  Mn(I/sd), it does not follow Willson law at high
> resolution.
> Is there a compromise to just exclude partial of these region?
> 
> Thanks!
> N  1/d^2    Dmid   Rmrg  Rfull   Rcum  Rmeas   Rpim    Nmeas      AvI
> RMSdev    sd  I/RMS Mn(I/sd)  FrcBias  Chi^2 Chi^2c   $$ $$
>   1  0.0017  24.37  0.037  0.037  0.037  0.043  0.022     4236     1235
> 112     65   11.0     42.7     -      1.30   0.97
>   2  0.0050  14.07  0.041  0.041  0.038  0.047  0.024     8627      389
>  32     24   12.1     37.3     -      0.99   0.98
>   3  0.0084  10.90  0.040  0.040  0.039  0.046  0.023    11346      438
>  37     26   11.7     37.3     -      0.97   0.96
>   4  0.0118   9.21  0.044  0.044  0.040  0.051  0.026    13482      275
>  24     18   11.3     33.1     -      0.95   0.94
>   5  0.0151   8.12  0.051  0.051  0.041  0.061  0.034    11303      148
>  15     12   10.1     23.1     -      0.93   0.88
>   6  0.0185   7.35  0.070  0.070  0.043  0.084  0.045    14124       84
>  10      9    8.3     18.7     -      0.93   0.93
>   7  0.0219   6.76  0.086  0.086  0.045  0.102  0.054    15700       65
>   9      8    7.1     15.9     -      0.98   0.97
>   8  0.0252   6.29  0.100  0.100  0.047  0.118  0.062    17497       54
>   8      8    6.4     14.3     -      0.96   0.96
>   9  0.0286   5.91  0.106  0.106  0.050  0.124  0.065    18961       54
>   9      8    6.1     14.0     -      0.95   0.94
>  10  0.0320   5.59  0.113  0.113  0.053  0.133  0.068    20406       52
>   9      9    5.8     13.5     -      0.95   0.95
>  11  0.0353   5.32  0.119  0.119  0.056  0.138  0.071    21836       53
>  10      9    5.5     13.2     -      0.98   0.98
>  12  0.0387   5.08  0.111  0.111  0.059  0.129  0.067    22914       64
>  11     10    5.9     14.2     -      1.01   1.00
>  13  0.0421   4.87  0.117  0.117  0.062  0.137  0.070    23980       63
>  11     10    5.6     13.6     -      1.02   1.01
>  14  0.0454   4.69  0.127  0.127  0.065  0.149  0.076    24916       61
>  12     11    5.2     12.8     -      1.02   1.01
>  15  0.0488   4.53  0.162  0.162  0.069  0.189  0.097    26030       47
>  11     11    4.1     10.5     -      1.01   1.01
>  16  0.0522   4.38  0.202  0.202  0.073  0.235  0.120    26790       38
>  12     11    3.3      8.9     -      0.99   0.99
>  17  0.0555   4.24  0.261  0.261  0.078  0.306  0.158    26547       30
>  12     11    2.6      7.1     -      1.01   1.01
>  18  0.0589   4.12  0.316  0.316  0.081  0.387  0.220    21957       24
>  12     11    2.0      5.2     -      1.00   0.96
>  19  0.0623   4.01  0.498  0.498  0.086  0.602  0.333    24279       16
>  13     12    1.3      3.7     -      1.01   0.98
>  20  0.0656   3.90  0.588  0.588  0.094  0.718  0.404    25888       21
>  33     13    0.6      3.9     -      3.12   1.24
>  21  0.0690   3.81  0.822  0.822  0.101  0.974  0.515    28128       12
>  15     14    0.8      2.7     -      1.03   1.00
>  22  0.0724   3.72  1.140  1.140  0.109  1.347  0.709    29583        9
>  18     15    0.5      2.0     -      1.25   1.01
>  23  0.0757   3.63  0.819  0.819  0.118  0.989  0.543    30705       18
>  58     16    0.3      2.2     -      1.81   1.09
>  24  0.0791   3.56  1.643  1.643  0.128  1.926  0.995    31626        7
>  18     16    0.4      1.5     -      1.03   1.00
>  25  0.0825   3.48  2.505  2.505  0.139  2.946  1.534    32327        5
>  23     17    0.2      1.0     -      1.33   1.06
>  26  0.0858   3.41  1.601  1.601  0.151  1.925  1.051    32349       10
>  52     18    0.2      1.4     -      2.72   1.17
> 
> -- 
> 
> ***************************************************
> 
> Charles Chen
> 
> Research Instructor
> 
> University of Pittsburgh School of Medicine
> 
> Department of Anesthesiology
> 
> ******************************************************
> 
> ########################################################################
> 
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-- 

*--------------------------------------------------------------
* Clemens Vonrhein, Ph.D.     vonrhein AT GlobalPhasing DOT com
* Global Phasing Ltd., Sheraton House, Castle Park 
* Cambridge CB3 0AX, UK                   www.globalphasing.com
*--------------------------------------------------------------

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