Data Item _reflns_shell.pdbx_Rpim_I_all
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General 
- Item name
- _reflns_shell.pdbx_Rpim_I_all
- Category name
- reflns_shell
- Attribute name
- pdbx_Rpim_I_all
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 14.6 % of entries
Item Description
The precision-indicating merging R factor value Rpim,
for merging all intensities in a given shell.
sumi [1/(Ni - 1)]1/2 sumj | Ij - <Ii> |
Rpim = --------------------------------------------------
sumi ( sumj Ij )
Ij = the intensity of the jth observation of reflection i
<Ii> = the mean of the intensities of all observations of
reflection i
Ni = the redundancy (the number of times reflection i
has been measured).
sumi is taken over all reflections
sumj is taken over all observations of each reflection.
Ref: Diederichs, K. & Karplus, P. A. (1997). Nature Struct.
Biol. 4, 269-275.
Weiss, M. S. & Hilgenfeld, R. (1997). J. Appl. Cryst.
30, 203-205.
Weiss, M. S. (2001). J. Appl. Cryst. 34, 130-135.
Data Type 
- Data type code
- float
- Data type detail
- float 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]+)?
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0.0 | +∞ |
Advisory Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0.01 | 1.0 |