Dear Deb, R_meas or R_rim is a merging R-factor which is independent of the redundancy or multiplicity of the data (hence its name), R_pim stands for precision indicating merging R-factor. R_pim gives you the precision of the averaged measurement, which is the one you are actually using for structure solution and refinement.
SCALA will calculate both R_rim (R_meas) and R_pim, XDS/XSCALE will calculate R_rim (R_meas) only, and SCALEPACK neither of the two. However, you may produce a file from SCALEPACK with scaled but unmerged intensities (option NO MERGE ORIGINAL INDEX) and then download a program from my site called RMERGE or RMERGE_4LINUX, which will do the job for you. If you have further questions, please see the page http://www.embl-hamburg.de/~msweiss/projects/msw_qual.html or ask me. Cheers, Manfred ******************************************************************** * * * Dr. Manfred S. Weiss * * * * Team Leader * * * * EMBL Hamburg Outstation Fon: +49-40-89902-170 * * c/o DESY, Notkestr. 85 Fax: +49-40-89902-149 * * D-22603 Hamburg Email: [EMAIL PROTECTED] * * GERMANY Web: www.embl-hamburg.de/~msweiss/ * * * ******************************************************************** On Sat, 6 Dec 2008, Debajyoti Dutta wrote: > ? Dear members, I have a little query hare about Rpim and Rmeans. How these are used to mark data quality, and how can one calculate it. Thak you for your reply in advance. Sincerely Deb
