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59 bytes added ,  13:51, 14 February 2008
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== Definitions ==
 
== Definitions ==
 
=== Data quality indicators ===
 
=== Data quality indicators ===
* R<sub>sym</sub> and R<sub>merge</sub> : the formula is (someone with LaTex knowledge please don't hesitate to fill in the formula!)
+
* R<sub>sym</sub> and R<sub>merge</sub> : the formula is
 
<math>
 
<math>
 
R_{merge} = \frac{\sum_{hkl}\vert I_{hkl}-\langle I_{hkl}\rangle\vert}{\sum_{hkl}I_{hkl}}
 
R_{merge} = \frac{\sum_{hkl}\vert I_{hkl}-\langle I_{hkl}\rangle\vert}{\sum_{hkl}I_{hkl}}
 +
</math>
 +
<br/>
 +
<br/>
 +
<math>
 +
R=\frac{\sum_{hkl_{unique}}\vert F_{hkl}^{(obs)}-F_{hkl}^{(calc)}\vert}{\sum_{hkl_{unique}} F_{hkl}^{(obs)}}
 
</math>
 
</math>
 
* Redundancy-independant version of the above: R<sub>meas</sub>
 
* Redundancy-independant version of the above: R<sub>meas</sub>
9

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