Data Item _em_map.r_value_all_data
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General 
- Item name
- _em_map.r_value_all_data
- Category name
- em_map
- Attribute name
- r_value_all_data
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The R-factor value compares overall agreement between the amplitudes
of two sets of structure factors as follows:
R= sigma || Fobs | - | Fcalc || / sigma | Fobs |
For each reflection the magnitude of the computed difference between
the observed structure-factor amplitude from the native data
set |Fobs| and the calculated amplitude from the model in its current
trial location |Fcalc| is summed for all reflections and divided by
the sum of the observed structure factors.
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]+)?