Re: [ccp4bb]: I to F's

[Phraenquex VD <loretta@scripps.edu>]

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> I would like to know if someone could tell me what is the mathematical
> algorithmn that is implemented in SCALEPACK2MTZ, when it converts I and
> sigmaI to F,sigmaF's,

Hi Ronado

Scalepack2mtz does not convert I to F, it merely writes I, sigmaI into mtz
format.  Then TRUNCATE does the conversion.  Basically:  F = sqrt(I), but
the reference is in the truncate manual.  

DANO is simply [F(+) - F(-)].

Does that help?

Cheers
Phraenquex



> 
> Imean and sigmaImean, and also in TRUNCATE when it calculates DANO, sigmaDANO from
> 
> F(+) and F(-).
> 
> Basically, I would like to know the formulas used in such programs for converting
> 
> a sca file with anomalous signal to a mtz.
> 
> Thanks you all for helping.
> 
> Ronaldo Nagem.
> 
> --
>  ______________________________________________________________________
>  Ronaldo A. P. Nagem                         |
>  Protein Crystallography Group               | E-mail:  nagem@lnls.br
>  LNLS Laboratorio Nacional de Luz Sincrotron | Phone:   55-019-2874520
>  Rua Giuseppe Maximo Scolfaro, 10.000 Guara  | Fax:     55-019-2877110
>  CEP 13084-971 Campinas SP Brasil            | Website: www.lnls.br
> 
> 
>