R-factors: Difference between revisions

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59 bytes added ,  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>
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