Hi Hailiang,
I posted this several times and here is another one.. The exact formula
and all the related details are here:
http://cci.lbl.gov/~afonine/FandR/Fmodel_and_Rfactor.pdf
(there is a small typo in the formula found by Lothar, but I leave it
for you to find -:) )
Also, here is another discussion related to R-factor mismatch that you
might find helpful:
http://www.mail-archive.com/ccp4bb@jiscmail.ac.uk/msg16463.html
Let me know if you have any questions.
Finally, to answer your question, I would suggest to have a look at:
/J. Appl. Cryst./ (2010). *43*, 669-676
which discusses the observations you have.
Pavel.
On 8/14/10 7:03 PM, Hailiang Zhang wrote:
Hi,
I have a very simple question about the R factor. I was trying to
reproduce the R factor reported in the PDB file. I used phenix.fmodel
incorporating solvent model, anisotropic scaling etc to calculate Fc, but
frequenlty it doesn't match the PDB R factor.
Now I am wondering what is the scaling factor generally used when
calculating R factor? Thanks a lot!
Best Regards, Hailiang
