There is also a CCP4 prog that compares phase sets,
phistats. Don't know if this does what Phil suggests.
Adam
On Wed, 29 Aug 2007, Phil Evans wrote:
> Kevin
>
> Does this give the correlation between two (weighted) complex Fs,
> which is arguably (ref Bricogne) the best measure, as it corresponds
> to the map correlation but as a function of resolution?
>
> Phil
>
> On 28 Aug 2007, at 17:22, Kevin Cowtan wrote:
>
> > Yup. cphasematch
> >
> > It gives unweighted and weighted mean phase errors and F and E
> > correlations. It'll also try the opposite hand if appropriate.
> >
> > It's in the GUI under Clipper utilities.
> >
> > For an example script, run it in the GUI and then view the command
> > file.
> >
> > Kevin
> >
> > Winter, G (Graeme) wrote:
> >> 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
>
|