[phenixbb] Map quality
pafonine at lbl.gov
Mon May 18 22:25:28 PDT 2015
Yes: phenix.map_comparison .
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,
> 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.
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