[ccp4bb] delete reflections with negative peak profile correlation

Hi All, Inspired by the "micro diffraction assembly" methods (see http://www.nature.com/nature/journal/vaop/ncurrent/full/nature12357.html), I checked one XDS_ASCII.HKL file and found many reflections has negative peak profile correlation. After deleted them and rerun XSCALE, I/sigma is higher a

Re: [ccp4bb] delete reflections with negative peak profile correlation

Dear Rain, I will let XDS expert users provide the definitive response to this because I'm not certain what exactly a "negative peak profile correlation" indicates. However, I would be very cautious about deleting reflections simply to improve the reported statistics. Taken t

Re: [ccp4bb] delete reflections with negative peak profile correlation

Hi, I completely agree with what Andrew writes. It's very easy: negative CORR means that the reflection profile after background subtraction has a negative correlation coefficient with the standard profile. How can this happen? Well, this situation occurs when the reflection is very weak and th

Re: [ccp4bb] delete reflections with negative peak profile correlation

Hi Kay, Thank you and Andrew very much. The paper you cited is really helpful!