[phenixbb] Map quality

[Pavel Afonine]

Yes: phenix.map_comparison .

Pavel

On 5/16/15 12:28 PM, Murpholino Peligro wrote:
> So...Is there a tool/program/formula to get equivalent sigma levels 
> between maps so they can be compared?
>
>
> 2015-05-15 11:37 GMT-05:00 Pavel Afonine <pafonine at lbl.gov 
> <mailto:pafonine at lbl.gov>>:
>
>     Hi Mohamed,
>
>     this is not a simple topic.. Two texts I suggest to have a look at
>     are listed below I'm sure there are more). They may not give you a
>     quick solution but perhaps will explain the issues.
>
>     Acta Cryst. (2014). D70, 2593-2606
>     Metrics for comparison of crystallographic maps
>
>     Acta Cryst. (2015). D71, 646-666.
>     FEM: feature-enhanced map
>
>     In a very nutshell,
>
>     - "1 sigma (or any other x sigma) level for one map may not be the
>     same as 1 sigma (or any other x sigma) level for another map";
>     - Think of "global vs local". Somehow you need to quantify map
>     quality locally.
>     - Map correlation (RSCC or map CC, for alternative names) may be a
>     misleading metric is used without care: for example, two poor but
>     similar map may give you high CC.
>
>     All the best,
>     Pavel
>
>
>     On 5/15/15 9:10 AM, mohamed noor wrote:
>
>         Dear all
>
>         Is there a single (or a few) metrics that can be used to
>         quantitatively assess map quality instead of looking at each
>         one in Coot? For example, I want to compare the effect of
>         having low completeness in the low resolution shells.
>
>         Thanks.
>
>
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