Is this something new in refmac, or something undocumented (or am I looking in the wrong place by checking LABOUT)?
-----Original Message----- From: CCP4 bulletin board on behalf of Kevin Cowtan Sent: Tue 7/8/2008 4:06 AM To: [email protected] Subject: Re: [ccp4bb] Definition of Fourier coefficients Yup, refmac too. Pavel Afonine wrote: > Not sure for other software, but in phenix.refine you can request to > output I*mFo-J*DFc map, where I and J are any user specified values. > > Pavel. > > > On 7/7/2008 6:00 PM, Meyer, Peter wrote: >> It is redundant, but it adds an additional step if someone wanted to >> calculate something like a 3mFO-2DFc map. >> >> Thanks, >> >> Pete >> >> -----Original Message----- >> From: Kevin Cowtan [mailto:[EMAIL PROTECTED] >> Sent: Mon 7/7/2008 10:18 AM >> To: Meyer, Peter >> Cc: [email protected] >> Subject: Re: [ccp4bb] Definition of Fourier coefficients >> >> Probably because in the classic implementation it is redundant, D >> being derived directly from sigmaa. >> >> Some programs refine D and sigmaa (or equivalent terms, such as >> Lunin's alpha and beta) separately. This is conceptually equivalent to >> deriving D from sigmaa and refining the scale between Fo and Fc >> simultaneously with sigmaa. >> >> Kevin >> >> >> Meyer, Peter wrote: >> >>> Slightly off-topic from the original question, but is there a reason >>> that most programs don't output D for sigma_a coefficients? >>> >>> Pete >>> >>> >>> -----Original Message----- >>> From: CCP4 bulletin board on behalf of Mayer, Mark (NIH/NICHD) [E] >>> Sent: Sat 7/5/2008 2:39 PM >>> To: [email protected] >>> Subject: [ccp4bb] Definition of Fourier coefficients >>> >>> Hi, >>> >>> What do m and D indicate in the Fourier coefficients for a 2mFo-DFc map? >>> >>> I've dug a bit in web and CCP4 doc but not found an explanation, >>> though I'm sure its there. >>> >>> Thanks, >>> >>> Mark >>> >>> >>> >>> > >
