It should be the unweighted mean to avoid bias towards I+ or I- (or Kevin Cowtan had a more complicated way) Phil
> On 12 Mar 2017, at 17:58, Eleanor Dodson <eleanor.dod...@york.ac.uk> wrote: > > You read: > h k l IPLUS SIGIPLUS INEG SIGINEG > Then program calculates this: > > SIGIMEAN = SIGIPLUS*SIGINEG/(SIGIPLUS+SIGINEG) > > IMEAN = (IPLUS/SIGIPLUS + INEG/SIGINEG)*SIGIMEAN > > ie: IMEAN = ( IPLUS*SIGINEG + INEG * SIGIPLUS ) / /(SIGIPLUS+SIGINEG) > > Is that the right thing to do? Not sure! > > Eleanor Dodson > > > > On 11 March 2017 at 15:18, Karthikeyan Subramanian <skarthi...@gmail.com> > wrote: > Dear CCP4bb, > > How IMEAN and SIGIMEAN is calculated in scalepack2mtz if the input is with > anomalous intensity (obtained from HKL2000). Any guide/reference is highly > appreciated. > > Thanks in advance, > > With regards > > Karthikeyan S. > > Principal Scientist > > IMTECH, Chandigarh >
