Data Item _em_map.r_free
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General 
- Item name
- _em_map.r_free
- Category name
- em_map
- Attribute name
- r_free
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The R-free statistic value measures the agreement between the atomic
model and the diffraction data for a 'test' set of reflections (usually
10%) that is omitted during refinement.
Data Type 
- Data type code
- float
- Data type detail
- int item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?