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R-factors: Difference between revisions
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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!) | ||
* Redundancy-independant version of the above: | * Redundancy-independant version of the above: R<sub>meas</sub> | ||
* measuring quality of averaged intensities/amplitudes: | * measuring quality of averaged intensities/amplitudes: R<sub>p.i.m.</sub> and R<sub>mrgd-F</sub> | ||
=== Model quality indicators === | === Model quality indicators === | ||
* R and | * R and R<sub>free</sub> : the formula is (LaTex please ) | ||
== what do R-factors try to measure, and how to interpret their values? == | == what do R-factors try to measure, and how to interpret their values? == | ||
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== what kind of problems exist with these indicators? == | == what kind of problems exist with these indicators? == | ||
- ( | - (R<sub>sym</sub> / R<sub>merge</sub> ) should not be used, R<sub>meas</sub> should be used instead (explain why ?) | ||
- R/ | - R/R<sub>free</sub> and NCS: reflections in work and test set are not independant | ||