Hi CCP4BB,

Is there a straightforward way to compute the mean phase difference
between two phase columns in an MTZ file, allowing for the difference in
the origin? I am thinking something like:

Cad together two reflection files - renaming the PHIB column, most
likely
Compute phi offset - apply to get the origins the same
Compute the r.m.s. phase difference in degrees etc.

Also - is there a general feeling as to how useful this is for comparing
the results of phasing between different packages? I was thinking that
PHI_ref could be computed fom the final refined structure, if this is
available, as a benchmark. Alternatively is there a "correct" way to be
doing things like this?

An example script would be really great...

Thanks,

Graeme


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