<div dir="ltr">So...Is there a tool/program/formula to get equivalent sigma levels between maps so they can be compared?<br><br></div><div class="gmail_extra"><br><div class="gmail_quote">2015-05-15 11:37 GMT-05:00 Pavel Afonine <span dir="ltr"><<a href="mailto:pafonine@lbl.gov" target="_blank">pafonine@lbl.gov</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Mohamed,<br>
<br>
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.<br>
<br>
Acta Cryst. (2014). D70, 2593-2606<br>
Metrics for comparison of crystallographic maps<br>
<br>
Acta Cryst. (2015). D71, 646-666.<br>
FEM: feature-enhanced map<br>
<br>
In a very nutshell,<br>
<br>
- "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";<br>
- Think of "global vs local". Somehow you need to quantify map quality locally.<br>
- 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.<br>
<br>
All the best,<br>
Pavel<div><div class="h5"><br>
<br>
On 5/15/15 9:10 AM, mohamed noor wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear all<br>
<br>
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.<br>
<br>
Thanks.<br>
</blockquote>
<br></div></div>
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