Data Item _refine.ls_wR_factor_R_free


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Required in PDB entries
Used in current PDB entries
Yes, in about 2.8 % of entries

Item Description

Weighted residual factor wR 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, and that were used as the test reflections (i.e. were excluded from the refinement) when the refinement included the calculation of a 'free' R factor. Details of how reflections were assigned to the working and test sets are given in _reflns.R_free_details. ( sum|w |Yobs - Ycalc|2| )1/2 wR = ( ---------------------------- ) ( sum|w Yobs2| ) Yobs = the observed amplitude specified by _refine.ls_structure_factor_coef Ycalc = the calculated amplitude specified by _refine.ls_structure_factor_coef w = the least-squares weight sum is taken over the specified reflections

Data Type

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float item types are the subset of numbers that are the floating numbers.
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