R-factors
Historically, R-factors were introduced by ...
Definitions
Data quality indicators
- Rsym and Rmerge : the formula is (someone with LaTex knowledge please don't hesitate to fill in the formula!)
- Redundancy-independant version of the above: Rmeas
- measuring quality of averaged intensities/amplitudes: Rp.i.m. and Rmrgd-F
Model quality indicators
- R and Rfree : the formula is (LaTex please )
what do R-factors try to measure, and how to interpret their values?
- relative deviation of
Data quality
- typical values: ...
Model quality
what kind of problems exist with these indicators?
- (Rsym / Rmerge ) should not be used, Rmeas should be used instead (explain why ?)
- R/Rfree and NCS: reflections in work and test set are not independant