Re: [ccp4bb] Second moments of Z but not twinning

2007-06-07 Thread Winter, G (Graeme)
t: [ccp4bb] Second moments of Z but not twinning Hi Folks, I was wondering if there is a document somewhere explaining some of the more interesting things which can be interpreted from the plot of second moment of Z = I'/ anywhere? I've looked around and I can't find much beyond

Re: [ccp4bb] Second moments of Z but not twinning

2007-06-01 Thread David Briggs
Hi Graeme, How is your data binned? I don't claim to be any statistician, but I seem to remember being told by such an individual that you need a decent number of reflections to be able to calculate a accurate/reliable second moment - and if, in your low-res bins, you have relatively few reflect

Re: [ccp4bb] Second moments of Z but not twinning

2007-06-01 Thread Eleanor Dodson
Have you looked at http://www.ccp4.ac.uk/dist/html/pxmaths/index.html It is an introduction .. Eleanor Randy talked about deviations at the CCP4 study weekend this year.. Winter, G (Graeme) wrote: Hi Folks, I was wondering if there is a document somewhere explaining some of the more intere

[ccp4bb] Second moments of Z but not twinning

2007-06-01 Thread Winter, G (Graeme)
Hi Folks, I was wondering if there is a document somewhere explaining some of the more interesting things which can be interpreted from the plot of second moment of Z = I'/ anywhere? I've looked around and I can't find much beyond the things pertaining to twinning, where it will have the magical v