Re: r13063 - /branches/inversion-recovery/maths_fns/inversion-recovery.c -- June 16, 2011 - 13:53

Hi,

It would be good to make this more general so that it can be used
elsewhere in the future.  I would suggest maybe the following.  We
have a number of equations for an exponential:

1) b*e^(a.t)
2) b*e^(-a.t)
3) -b*e^(a.t)
4) -b*e^(-a.t)
5) c + b*e^(a.t)
6) c + b*e^(-a.t)
7) c - b*e^(a.t)
8) c - b*e^(-a.t)

For the inversion recovery we use 8) and for the normal Rx we use 2).
So maybe we could have a series of these functions, all of which are
very similar.  They could be called:

1) exp_2param
2) exp_2param_neg
1) exp_2param_inv
2) exp_2param_inv_neg
5) exp_3param
6) exp_3param_neg
7) exp_3param_inv
8) exp_3param_inv_neg

These would be incredibly easy to add by simple code duplication (this
is the fastest way computationally).  What do you think?

Cheers,

Edward



On 16 June 2011 12:24, Sébastien Morin <sebastien.morin.1@xxxxxxxxx> wrote:
> Hi Ed,
>
> If you wish, yes, I could merge the files... This does not really change
> much.
>
> As for a more generic name, what do you propose ? "exponential_2" ?
> "exponential_build-up" ?
>
> Cheers,
>
>
> Séb  :)
>
>
> On 11-06-16 12:16 PM, Edward d'Auvergne wrote:
> > Hi Seb,
> >
> > This second file is not really needed.  These are simply two
> > exponentials, one with a plateau value.  So two functions within
> > maths_fns/exponential.c could be created for these two exponential
> > forms.  Just duplicate the current and come up with two related names.
> >  It can be kept generic as well, there is no need to call it
> > inversion-recovery.
> >
> > Cheers,
> >
> > Edward
> >
> >
> > On 16 June 2011 12:07,<sebastien.morin@xxxxxxxxx>  wrote:
> > > Author: semor
> > > Date: Thu Jun 16 12:07:05 2011
> > > New Revision: 13063
> > >
> > > URL: http://svn.gna.org/viewcvs/relax?rev=13063&view=rev
> > > Log:
> > >
> > > Copied the exponential curve fitting c code as a template for the
> > > inversion-recovery code.
> > >
> > > The command used was:
> > > svn cp maths_fns/exponential.c  maths_fns/inversion-recovery.c
> > >
> > >
> > > Added:
> > >    branches/inversion-recovery/maths_fns/inversion-recovery.c
> > >      - copied unchanged from r13062,
> > > branches/inversion-recovery/maths_fns/exponential.c
> > >
> > >
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> --
> Sébastien Morin, Ph.D.
> Postdoctoral Fellow, S. Grzesiek NMR Laboratory
> Department of Structural Biology
> Biozentrum, Universität Basel
> Klingelbergstrasse 70
> 4056 Basel
> Switzerland