Re: [ccp4bb] definition of I Sigma I [SEC=UNCLASSIFIED]

2008-12-11 Thread DUFF, Anthony
, 12 December 2008 9:37 AM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] definition of I Sigma I There was a detailed and useful discussion of this on this list back around Dec 1, 2003. If you search in the archives for "I on sig I" you will find it. Best Richard On Dec 10, 2008,

Re: [ccp4bb] definition of I Sigma I

2008-12-11 Thread Richard Gillilan
There was a detailed and useful discussion of this on this list back around Dec 1, 2003. If you search in the archives for "I on sig I" you will find it. Best Richard On Dec 10, 2008, at 5:14 PM, ANDY DODDS wrote: Hi, does anyone have a definition of I Sigma I please. Any definitions t

Re: [ccp4bb] definition of I Sigma I

2008-12-10 Thread Anastassis Perrakis
Hi - "I Sigma I" means nothing. / is the average intensity of a group of reflections divided by the average standard deviation (sigma) of the same group of reflections. Usually its reported per resolution shell, groups of reflections within thin shells of resolution. is the intensity di

[ccp4bb] definition of I Sigma I

2008-12-10 Thread ANDY DODDS
Hi, does anyone have a definition of I Sigma I please. Any definitions that i have found are not very informative for novices. thanks andy