Data Item _refine.correlation_coeff_Fo_to_Fc_free


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Attribute name
Required in PDB entries
Used in current PDB entries
Yes, in about 37.8 % of entries

Item Description

The correlation coefficient between the observed and calculated structure factors for reflections not included in the refinement (free reflections). The correlation coefficient is scale-independent and gives an idea of the quality of the refined model. sumi(Foi Fci - <Fo><Fc>) Rcorr = ------------------------------------------------------------ SQRT{sumi(Foi)2-<Fo>2} SQRT{sumi(Fci)2-<Fc>2} Fo = observed structure factors Fc = calculated structure factors <> denotes average value summation is over reflections not included in the refinement (free reflections)

Data Type

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Data type detail
float item types are the subset of numbers that are the floating numbers.
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Regular expression

Advisory Boundary Conditions

Minimum Value Maximum Value
0.8 1
0 1