I cant answer for cphasematch but I believe it uses a resolution
dependent phase analysis discussed by Woolfson and Lunin in the 1980s
and similar to the method used to calculate the MAPCC used in SHELXE
That checks for a possible origin shift as well as analysing
difference - but I presume you have no origin shift?
PHISTATS documentation describes what it does:
First phase differences are corrected for differences of nPI to always
lie between -180 and +180
It outputs:
<Phase_diff>
CC of phase_diff with W1 and W2
CC of cos(phi_diff) with W1 and W2
Eleanor
1) James Tucker Swindell II wrote:
I am currently working with two of ccp4i's phase comparison software
packages, Phase Comparison(a clipper utility) and Phistats. I am
having a problem finding information concerning both how the programs
actaully analyze the data (since I find slightly different results
with each program) and finding documentation concerning the labeling
of the columns in the output log files.
In Phase Comparison I am using phase/weight(phi/tom)
In Phistat I am using
PHIBP = PHIC WP = FOM
PHIB2 = PHIB. W2 = FOMM
Both results are very close buy I am intersted in what algorithmis
being used in each, perhaps not to technical but enough to truly
understand what each program is doing and it's corresponding output.
Any assistance would be appreciated
James Tucker Swindell II
Ph.D. Candidate, Physics
Research:
Department of Biochemistry and Molecular Biology
University of Georgia
B202 Davison Life Sciences Bldg.
1057 East Green St.
Athens Ga, 30605
Lab: 1(706)-542-2913
Direct: 1(706)-247-5220
Fax: 1(706)-542-3077
[email protected]
