Data Item _em_map_resolution.sigma_weight
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General 
- Item name
- _em_map_resolution.sigma_weight
- Category name
- em_map_resolution
- Attribute name
- sigma_weight
- Required in PDB entries
- no
- Used in current PDB entries
- No
Item Description
the curve has to be weigthed taking into the account the number of
independent asymmetric units (N). In that case the curve would be
defined as sqrt(N)*3*sigma. This is the weighted factor used.
If this weighted factor is always defined as 3*sqrt(N) then we only
need to know the number of independent units N.
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]+)?