Hi Mike, this requires scaled but unmerged data, and there are few programs that support unmerged MTZ files. So it is probably necessary to write your own program(s), that process XDS_ASCII.HKL or XSCALE.HKL. Or you start by extracting from AIMLESS code. HTH, Kay On Tue, 12 Aug 2014 13:52:30 -0700, Michael Thompson <[log in to unmask]> wrote: >Hello All, > >I'm interested in doing some comparisons of random half data sets, inspired by statistics like CC1/2, CC*, etc. Does CCP4 contain some tool to split unmerged data into 2 random sets? Or is there some way to intercept this information from something like XSCALE or Aimless, etc.? Thought I would ask before trying to write my own script. > >Thanks, > >Mike > > > > > > > > >-- >Michael C. Thompson > >Postdoctoral Scholar > >Institute of Genomics and Proteomics > >University of California, Los Angeles > >[log in to unmask]