Hi Peter,

what does "score: a likelihood based score combining all info" exactly mean? What is the "good value" (and why), what is "so-so value", and what is the "bad value" (and why)? Could you please give a reference to where this score is defined and its use is evaluated?

I asked myself all these questions when I read this phrase in your reply below and, sorry for my ignorance, I failed to find the answers.

Thanks!
Pavel.


On 4/20/09 12:06 PM, Peter Zwart wrote:

2009/4/20  <[email protected]>:
  

Hi,

I tried running phenix xtriage with a scaled data in P4322 space group. I
got the following output:
-----------------------------------------------------------------------------------
| space group | n absent | <Z>_absent | <Z/sigZ>_absent | +++ | --- |
score       |
-----------------------------------------------------------------------------------
| P 4 2 2     | 0        |     0.00   |     0.00        |  0  |  5  |
0.000e+00  |
| P 41 2 2    | 0        |     0.00   |     0.00        |  0  |  5  |
0.000e+00  |
| P 42 2 2    | 0        |     0.00   |     0.00        |  0  |  5  |
0.000e+00  |
| P 43 2 2    | 0        |     0.00   |     0.00        |  0  |  5  |
0.000e+00  |
| P 4 21 2    | 8        |     1.71   |     8.07        |  6  |  3  |
4.817e+00  |
| P 41 21 2   | 8        |     1.71   |     8.07        |  6  |  3  |
4.817e+00  |
| P 42 21 2   | 8        |     1.71   |     8.07        |  6  |  3  |
4.817e+00  |
| P 43 21 2   | 8        |     1.71   |     8.07        |  6  |  3  |
4.817e+00  |

Can anyone explain what these numbers mean? It seems all enantiomorphic
space groups have the same score (which is the last column)
    

n absent: number of absent intensities according to spacegroup

Z absent: mean normalized intensity for absent reflections
Z/sigZ: 'signal to noise' of absent reflections
+++ : reflections that seem present that should be absent
---- : reflections that seem absent but should be present
score: a likelihood based score combining all info

If you want, you can send me your sca file and I can have look to make
sure that nothing is messed up.

Cheers

Peter


  

The documentation in phenix does not explain this in detail.
I scaled the data in HKL2000 and there was no systematic absences with
P43222.
Thanks,
Shya


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