Hello,
The scale factors are entered in the text fields just above the table.
(That paper suggests how one could determine their ratio using
gyromagnetic ratios.)
Wayne
On Mon, 28 Jan 2013, Marie-Laurence Tremblay wrote:
> What are the scale factors?
>
>
> On Mon, Jan 28, 2013 at 6:30 AM, Wayne Boucher <[log in to unmask]> wrote:
> Hello,
>
> The "Shift Dist" in Analysis is:
>
> sqrt(d1*d1 + d2*d2)
>
> where d1 = delta1*scaleFactor1 and similarly for d2, where the scale
> factors are as entered in the dialog and the deltas are just the
> differences of the shift values. This looks like eqn (1) in that
> paper.
>
> The "Shift Sum" is abs(d1) + abs(d2). This looks like eqn (5) in that
> paper.
>
> I'm not sure there is any perfect answer here.
>
> Wayne
>
> On Fri, 25 Jan 2013, Marie Tremblay wrote:
>
> Hi,
>
> I am using the Data Analysis > Shift differences to
> compare 2 peaks lists. Is the method to calculate the
> "Shift sum" and "Shift dist" comes from the reference
> "Schumann FH, ..., Kalbitzer HR. Combined chemical
> shift changes and amino acid specific chemical shift
> mapping of protein-protein interactions. J. Biomol. NMR.
> 2007 Dec;39(4):275–89"?
>
> Cheers,
> Marie
>
>
>
>
> --
> Marie-Laurence Tremblay, PhD candidate
> Department of Biochemistry and Molecular Biology
> Dalhousie University
> 5850 College St.
> Halifax NS, Canada
> B3H 1X5
> [log in to unmask]
> Phone:902-494-4812
>
>
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