Re: [ccp4bb] I/sigma for h+k=2n+1 and h+k=2n

2011-07-27 Thread ccp4
From memory - check the documentation mtzutils hklin1 data.mtz RZONE 1 1 0 2 0 lists reflections with h+k = 2n END mtzutils hklin1 data.mtz RZONE 1 1 0 2 1 lists reflections with h+k = 2n+1 END Eleanor This will list all On Tue, 26 Jul 2011 09:51:47 -0400, zhang yu

[ccp4bb] I/sigma for h+k=2n+1 and h+k=2n

2011-07-26 Thread zhang yu
Hi, I had a dataset which is P21 but with a pseudo-translational symmetry of (1/2, 1/2 ,0). Theoretically the dataset should show systematic weak spots of h+K= 2n+1 compared to h+k= 2n. Is that correct? I would like to have a close look at the reflections. for example, the average I/sigma for

Re: [ccp4bb] I/sigma for h+k=2n+1 and h+k=2n

2011-07-26 Thread Ed Pozharski
On Tue, 2011-07-26 at 09:51 -0400, zhang yu wrote: I would like to have a close look at the reflections. for example, the average I/sigma for reflections with h+k=2n+1 and reflections with h +k=2n. Once you have your reflections listed in a file having h,k,l,f,sigf as first five columns (e.g.

Re: [ccp4bb] I/sigma for h+k=2n+1 and h+k=2n

2011-07-26 Thread Esko Oksanen
Yu, There is a parity analysis in dataman (a USF program) for example. You have to take into account that the sigmas are generally estimated assuming a unimodal intensity distribution, which is no longer true in the pseudo-symmetric case. In practice this means that the sigmas of the

Re: [ccp4bb] I/sigma for h+k=2n+1 and h+k=2n

2011-07-26 Thread zhang yu
Hi Thanks for all the replies. I ran TRUNCATE in CCP4 and got what I want. I will try other options later. Thank you again. Yu 2011/7/26 Esko Oksanen esko.oksa...@helsinki.fi Yu, There is a parity analysis in dataman (a USF program) for example. You have to take into account that the