Hello,
Tim says:
The below can be done in Analysis. In the relaxation analysis (Follow
Intensity Changes) the peak search tolerance could be really tight, so
peaks are picked at the reference peak list positions. The reference peak
list could be a synthetic peak list, i.e. at shift averages. A special
shift list could be setup for only the experiment(s) of the relaxation
series, to generate a local average, although old 'real' peaks may have to
be deleted in the series (or else new a different active peak list made
for the series) so only the reference positions are used.
If there is consensus about whether this method is a good idea to reduce
noise, Analysis could be setup in the future to (optionally) take
intensities at the averaged positions of the series, as distinct from the
picked peak locations which would be left unaltered.
Wayne
On Tue, 5 Jun 2012, Martin Ballaschk wrote:
> Hi,
>
> on the relax mailing list, Edward d'Auvergne proposed a new way of following the peaks heights in a series of spin relaxation measurements to avoid picking noise on top of the peaks:
>
>> - For the first spectrum in the time series, shift the peak list to
>> the tops of the peaks (i.e. 'pc' in Sparky).
>> - Copy this 1st spectrum list onto all spectra, shifting the peaks to
>> the top/centre.
>> - When the peak disappears into the noise, leave it at its current
>> position and do not type 'pc' or equivalent.
>> - Once all spectra are shifted, calculate an average peak list.
>> - Copy this average peak list onto fresh copies of all spectra.
>> - Measure peak heights using this averaged peak list.
>
> https://mail.gna.org/public/relax-users/2012-05/msg00018.html
>
> As he metions in the above message, this technique will be part of a upcoming paper.
>
> My question is: How can I do that with CCPN Analysis? As far as I know, there is no way to calculate averaged peak lists. Also, I have no idea how to insert the averaged peaks into the planes of a pseudo 3D.
>
> Any help implementing Edwards idea is appreciated.
>
> Cheers
> Martin
>
> --
> Martin Ballaschk
> AG Schmieder
> Leibniz-Institut für Molekulare Pharmakologie
> Robert-Rössle-Str. 10
> 13125 Berlin
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> Tel.: +49-30-94793-234/315
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>
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