Data Item _refine.ls_R_factor_obs


Item name
Category name
Attribute name
Required in PDB entries
Used in current PDB entries
Yes, in about 81.7 % of entries

Item Description

Residual factor R for reflections that satisfy the resolution limits established by _refine.ls_d_res_high and _refine.ls_d_res_low and the observation limit established by _reflns.observed_criterion. _refine.ls_R_factor_obs should not be confused with _refine.ls_R_factor_R_work; the former reports the results of a refinement in which all observed reflections were used, the latter a refinement in which a subset of the observed reflections were excluded from refinement for the calculation of a 'free' R factor. However, it would be meaningful to quote both values if a 'free' R factor were calculated for most of the refinement, but all of the observed reflections were used in the final rounds of refinement; such a protocol should be explained in _refine.details. sum|Fobs - Fcalc| R = --------------------- sum|Fobs| Fobs = the observed structure-factor amplitudes Fcalc = the calculated structure-factor amplitudes sum is taken over the specified reflections

Data Type

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

Allowed Boundary Conditions

Minimum Value Maximum Value



Alias Item Name Dictionary Name Dictionary Version
_refine_ls_R_factor_obs cif_core.dic 2.0.1