Hi Andras,

If you update relax and recompile the C modules:

$ svn up
$ scons clean_all
$ scons

Then run your system test:

$ relax -sd Relax_fit.test_saturation_recovery

You should now see that the test passes.  I have implemented the
saturation recovery equations, gradients, and Hessians in the new
target_functions/exponential_sat.c file.  If you would like to create
Sparky files for the inversion recovery experiment, where I0 < Iinf, I
could do the same thing for this curve type as well.

Cheers,

Edward




On 29 November 2014 at 16:58, Edward d'Auvergne <edw...@nmr-relax.com> wrote:
> Hi Andras,
>
> I've now added this:
>
> - The script has been added
> (http://article.gmane.org/gmane.science.nmr.relax.scm/24570).
> - Modified the script to work as a system test
> (http://article.gmane.org/gmane.science.nmr.relax.scm/24572).
> - Updated the copyright notice with your name
> (http://article.gmane.org/gmane.science.nmr.relax.scm/24574).
> - Created the system test
> (http://article.gmane.org/gmane.science.nmr.relax.scm/24575).
>
> Your script can now be run by typing:
>
> $ relax -sd Relax_fit.test_saturation_recovery
>
> Regards,
>
> Edward
>
>
>
> On 29 November 2014 at 15:23, Boeszoermenyi, Andras
> <andras_boeszoerme...@hms.harvard.edu> wrote:
>> Dear Edward,
>>
>> thanks a lot for the great explanations.
>>
>> Unfortunately, I cannot figure out, what to paste where and rename to what.
>>
>> I won't feel offended though, if you implement it.
>>
>> Best,
>> Andras
>> ________________________________________
>> From: edward.dauver...@gmail.com [edward.dauver...@gmail.com] On Behalf Of 
>> Edward d'Auvergne [edw...@nmr-relax.com]
>> Sent: Friday, November 28, 2014 1:24 PM
>> To: Boeszoermenyi, Andras
>> Cc: relax-devel@gna.org; Sébastien M
>> Subject: Re: [sr #3195] Fitting of saturation recovery experiment
>>
>> Hi Andras,
>>
>> To push changes into the source code repository, you'd have to become
>> a relax developer.  If you are interested, I'd recommend first reading
>> of the 'open source infrastructure' and 'relax development' chapters
>> of the manual.  These chapters outline the procedure in full detail.
>> Do you have experience with CVS, subversion, git, or other source code
>> revision control systems?
>>
>> The first step to have changes made to relax is to upload either files
>> or patches to a relax task, and ask for it to be included or applied.
>> For example I could take the script you have just attached to the task
>> in the 'saturation_recovery.tar.gaz' file (https://gna.org/task/?7415,
>> https://gna.org/task/download.php?file_id=22997), and place this into
>> the relax system test directories.  However, if you feel adventurous,
>> you could try to create your own system test from this!  I could then
>> incorporate your self designed test and add this to relax.  Creating
>> this test is rather straight forward:
>>
>>
>> - Firstly you will need a copy of the relax trunk in your home
>> directory that you can modify yourself.  The /sw/lib/ version is no
>> good for this.
>>
>>
>> - Copy your script to the new file
>> test_suite/system_tests/scripts/relax_fit_saturation_recovery.py.  Add
>> this to the repository by typing:
>>
>> $ svn add test_suite/system_tests/scripts/relax_fit_saturation_recovery.py
>>
>> You can then see the status of the relax source code by typing:
>>
>> $ svn st
>>
>> which will show your newly added script.
>>
>>
>> - The next step would be to add a copyright notice.  Open any relax
>> *.py file and copy the notice from the top into your script.  Remove
>> all authors and place your name and the year there.  You could also
>> include the link to your Gna! profile in brackets after your name
>> (https://gna.org/users/andras).
>>
>>
>> - Then to create the test itself.  I would suggest that this is called
>> Relax_fit.test_saturation_recovery.  Open the
>> test_suite/system_tests/relax_fit.py in a text editor (preferably
>> something such as gvim or emacs where source code is recognised, and
>> coloured, and the programs help you with the code).  Copy the 11 lines
>> of the test_zooming_grid_search() method
>> (http://www.nmr-relax.com/api/3.3/test_suite.system_tests.relax_fit-pysrc.html#Relax_fit.test_zooming_grid_search)
>> and paste and rename it to test_saturation_recovery().  Be sure that
>> alphabetical order is preserved.  Change the script name to your
>> script, and the chi-squared value to 0.0, and the I0 and Rx values to
>> your values.  As you are changing this file, add a new line to the
>> copyright notice with your name and the year.
>>
>>
>> - Try running the test with:
>>
>> $ relax -s Relax_fit.test_saturation_recovery
>>
>>
>> - This will probably not run straight away, as you need to fix the
>> paths in the script.  Open your script and the
>> test_suite/system_tests/scripts/relax_fit_zooming_grid.py script
>> side-by-side (run 'svn up' now as I just simplified this reference
>> script for you).  Note the use of the relax status object (used to
>> find where relax is installed) and the os.sep Python module to support
>> all operating systems, as '/' in Windows is '\' (fortunately Macs
>> don't use ':' as a folder separator any more).  After this the test
>> should run and be complete.  Yet it will fail due to the chi-squared
>> and parameter check, and because the saturation-recovery equations are
>> not implemented yet.
>>
>>
>> - Finally prepare a patch by typing:
>>
>> $ svn diff > patch
>>
>> This will contain all the changes, including the new script file.
>> Upload the 'patch' file to the task, remembering to add a comment
>> describing the patch.  You may even wish to create your own commit
>> message - see the development chapter.
>>
>>
>> - Code review.  I'll look at the patch and make suggestions for
>> improvements.  Changes can be made and a new patch created and
>> uploaded.
>>
>>
>> - Once the patch is in a good state,  I can apply it to the relax
>> trunk and permanently commit the change to the repository.
>>
>>
>> This is essentially the starting procedure for becoming a developer.
>> Many more details are given in the development chapter.  The reason
>> I'm mentioning all of this now is because it's 7 pm Friday evening
>> here and I won't have a chance to look at this until next week.  For
>> me, creating this test is less than 5 min of work.  If you have the
>> interest, feel free to try it out yourself.
>>
>> Regards,
>>
>> Edward
>>
>>
>> P. S.  As for deleting files, this is not possible.  The
>> infrastructure that relax uses, and open source infrastructure in
>> general, is deliberately designed so that everything is permanent.
>>
>>
>>
>> On 28 November 2014 at 18:38, Boeszoermenyi, Andras
>> <andras_boeszoerme...@hms.harvard.edu> wrote:
>>> Hi,
>>>
>>> great, this really helped.
>>>
>>> The script runs now for exponential fitting 'exp' and throws an error for 
>>> inversion recovery fitting 'inv'.
>>>
>>> I uploaded a new saturation recovery folder:
>>>
>>> file #22997:  saturation_recovery.tar.gaz
>>>
>>> Is there a way to remove the old one? And is there a way for me to push 
>>> changes through svn?
>>>
>>> Best,
>>> Andras
>>> ____________________________
>>> From: edward.dauver...@gmail.com [edward.dauver...@gmail.com] On Behalf Of 
>>> Edward d'Auvergne [edw...@nmr-relax.com]
>>> Sent: Friday, November 28, 2014 12:16 PM
>>> To: Boeszoermenyi, Andras
>>> Cc: relax-devel@gna.org; Sébastien M
>>> Subject: Re: [sr #3195] Fitting of saturation recovery experiment
>>>
>>> Hi,
>>>
>>> Ok, then you're almost there.  You'll need to obtain a copy of minfx
>>> (https://gna.org/projects/minfx/) and bmrblib
>>> (https://gna.org/projects/bmrblib/).  These used to be relax packages,
>>> but they have been spun out into their own for others to take
>>> advantage of.  For this, type:
>>>
>>> $ cd /sw/lib/relax-trunk/
>>> $ svn co http://svn.gna.org/svn/minfx/tags/1.0.11/minfx
>>> $ svn co http://svn.gna.org/svn/bmrblib/tags/1.0.3/bmrblib
>>>
>>> This is performed when a new relax release is made so that minfx and
>>> bmrblib are bundled with relax, but this needs to be performed
>>> manually when using the most cutting edge code.  Note that it is much
>>> better to place the relax-trunk into your home directory as this will
>>> be constantly modified by the relax developers.  Then, as a normal
>>> user (without sudo), you can obtain the latest code by typing:
>>>
>>> $ svn up
>>>
>>> Regards,
>>>
>>> Edward
>>>
>>>
>>> P. S.  The command for showing the PATH environmental variable is
>>> "echo $PATH" rather than just "$PATH".
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On 28 November 2014 at 18:07, Boeszoermenyi, Andras
>>> <andras_boeszoerme...@hms.harvard.edu> wrote:
>>>> Hi,
>>>>
>>>> so I aliased relax to the trunk relax and can start it now, but here is 
>>>> the problem:
>>>>
>>>>  File "/sw/lib/relax-trunk/relax", line 4, in <module>
>>>>     import relax
>>>>   File "/sw/lib/relax-trunk/relax.py", line 37, in <module>
>>>>     import dep_check
>>>>   File "/sw/lib/relax-trunk/dep_check.py", line 90, in <module>
>>>>     if not minfx.__version__ == 'trunk' and 
>>>> version_comparison(minfx.__version__, min_version) == -1:
>>>> AttributeError: 'module' object has no attribute '__version__'
>>>>
>>>> which relax now gives:
>>>>
>>>> which relax
>>>> relax:   aliased to /sw/lib/relax-trunk/relax
>>>>
>>>> and $PATH:
>>>>
>>>> /sw/bin:/sw/sbin:.:/Applications/NMRpipe/nmrbin.mac:/Applications/NMRpipe/com:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/Applications/xplor-nih-2.33/bin:/opt/X11/bin:
>>>>  Command not found.
>>>>
>>>>
>>>> The locations are:
>>>>
>>>> /sw/lib/relax-py27/relax_gui_mode.py
>>>> /sw/lib/relax-py27/relax_gui_mode.pyo
>>>> /sw/lib/relax-trunk/relax_gui_mode.py
>>>>
>>>> I installed relax previously with fink. Unfortunately, fink does't support 
>>>> yosemite yet, so I can't install newer versions this way, except for the 
>>>> app.
>>>>
>>>> Best regards,
>>>> Andras
>>>> ________________________________________
>>>> From: edward.dauver...@gmail.com [edward.dauver...@gmail.com] On Behalf Of 
>>>> Edward d'Auvergne [edw...@nmr-relax.com]
>>>> Sent: Friday, November 28, 2014 11:46 AM
>>>> To: Boeszoermenyi, Andras
>>>> Cc: relax-devel@gna.org; Sébastien M
>>>> Subject: Re: [sr #3195] Fitting of saturation recovery experiment
>>>>
>>>> Hi,
>>>>
>>>> Hmmm, this might be difficult to work out due to the number of
>>>> possibilities (Fink, Homebrew, framework installs, standard installs,
>>>> etc.).  So I'd need a bit more information.  Which method did you use
>>>> to obtain the code for the relax trunk?  Do you have Xcode, Scons,
>>>> subversion, Python, etc. installed all via DMG packages?  How did you
>>>> install relax to start with?  Are you the administrator for your
>>>> computer?  To find the different relax installations, maybe type:
>>>>
>>>> $ sudo /usr/libexec/locate.updatedb
>>>> $ locate relax_gui_mode.py
>>>>
>>>> Could you copy and paste the output of this into a mail?  This should
>>>> find all places where relax is located (the relax_gui_mode.py script
>>>> is simply a unique file name).  Then to find out where the default
>>>> relax is, type:
>>>>
>>>> $ which relax
>>>>
>>>> This will be the version that runs when you type 'relax'.  If you have
>>>> the relax trunk in the ~/relax-trunk directory (where ~ is your home
>>>> directory), then to run this version type:
>>>>
>>>> $ ~/relax-trunk/relax
>>>>
>>>> Does this work for you?  You can sometimes override the version
>>>> installed in /usr/local/ by creating a 'bin' directory and linking the
>>>> main relax file:
>>>>
>>>> $ cd ~
>>>> $ mkdir bin
>>>> $ cd bin
>>>> $ ln -s ~/relax-trunk/relax
>>>> $ cd
>>>> $ which relax
>>>>
>>>> Replace "~/relax-trunk" with any path you wish.  Normally ~/bin will
>>>> come before /usr/local in your $PATH environmental variable.  To be
>>>> sure, could you tell me what you see when you type:
>>>>
>>>> $ echo $PATH
>>>>
>>>> Note that in all of the above commands, that the '$ ' is the terminal
>>>> or prompt and that you should not type this.
>>>>
>>>> Regards,
>>>>
>>>> Edward
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 28 November 2014 at 17:30, Boeszoermenyi, Andras
>>>> <andras_boeszoerme...@hms.harvard.edu> wrote:
>>>>> Hi,
>>>>>
>>>>> would you happen to know where all these things install themselfes to. I 
>>>>> am at a complete loss.
>>>>>
>>>>> Best,
>>>>> Andras
>>>>> ________________________________________
>>>>> From: edward.dauver...@gmail.com [edward.dauver...@gmail.com] On Behalf 
>>>>> Of Edward d'Auvergne [edw...@nmr-relax.com]
>>>>> Sent: Friday, November 28, 2014 9:53 AM
>>>>> To: Boeszoermenyi, Andras
>>>>> Cc: relax-devel@gna.org; Sébastien M
>>>>> Subject: Re: [sr #3195] Fitting of saturation recovery experiment
>>>>>
>>>>> Hi,
>>>>>
>>>>> Somehow the relax-trunk version is not located on the system path or
>>>>> it doesn't have priority over the installed 3.1.7 version.  You could
>>>>> supply the full path to override this, uninstall the 3.1.7 version, or
>>>>> change the order of the directories in the $PATH environmental
>>>>> variable.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Edward
>>>>>
>>>>>
>>>>>
>>>>> On 28 November 2014 at 15:47, Boeszoermenyi, Andras
>>>>> <andras_boeszoerme...@hms.harvard.edu> wrote:
>>>>>> Well I installed the relax-trunk version, but I am not sure if that is 
>>>>>> what I am running.
>>>>>>
>>>>>> When I type relax -i
>>>>>>
>>>>>> I get this header:
>>>>>>
>>>>>> relax 3.1.7
>>>>>>
>>>>>>                               Molecular dynamics by NMR data analysis
>>>>>>
>>>>>>                              Copyright (C) 2001-2006 Edward d'Auvergne
>>>>>>                          Copyright (C) 2006-2014 the relax development 
>>>>>> team
>>>>>>
>>>>>> This is free software which you are welcome to modify and redistribute 
>>>>>> under the conditions of the
>>>>>> GNU General Public License (GPL).  This program, including all modules, 
>>>>>> is licensed under the GPL
>>>>>> and comes with absolutely no warranty.  For details type 'GPL' within 
>>>>>> the relax prompt.
>>>>>>
>>>>>> Assistance in using the relax prompt and scripting interface can be 
>>>>>> accessed by typing 'help' within
>>>>>> the prompt.
>>>>>>
>>>>>> Processor fabric:  Uni-processor.
>>>>>>
>>>>>> Best,
>>>>>> Andras
>>>>>>
>>>>>> ________________________________________
>>>>>> From: edward.dauver...@gmail.com [edward.dauver...@gmail.com] On Behalf 
>>>>>> Of Edward d'Auvergne [edw...@nmr-relax.com]
>>>>>> Sent: Friday, November 28, 2014 9:44 AM
>>>>>> To: Boeszoermenyi, Andras
>>>>>> Cc: relax-devel@gna.org; Sébastien M
>>>>>> Subject: Re: [sr #3195] Fitting of saturation recovery experiment
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> What do you see when you run:
>>>>>>
>>>>>> $ relax -i
>>>>>>
>>>>>> Are you using the latest relax trunk version?  Or the 3.3.3 version?
>>>>>> I only see this on versions 3.2.3 or earlier, in relax 3.3.0 and later
>>>>>> this works.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Edward
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 28 November 2014 at 15:40, Boeszoermenyi, Andras
>>>>>> <andras_boeszoerme...@hms.harvard.edu> wrote:
>>>>>>> That's exactly what I see.
>>>>>>>
>>>>>>> But you seem to be getting that error too, or am I mixing something up 
>>>>>>> now?
>>>>>>>
>>>>>>> Best,
>>>>>>> Andras
>>>>>>> ________________________________________
>>>>>>> From: edward.dauver...@gmail.com [edward.dauver...@gmail.com] On Behalf 
>>>>>>> Of Edward d'Auvergne [edw...@nmr-relax.com]
>>>>>>> Sent: Friday, November 28, 2014 9:34 AM
>>>>>>> To: Boeszoermenyi, Andras
>>>>>>> Cc: relax-devel@gna.org; Sébastien M
>>>>>>> Subject: Re: [sr #3195] Fitting of saturation recovery experiment
>>>>>>>
>>>>>>> Hi Andras,
>>>>>>>
>>>>>>> That message is what happens when you execute the minimise.grid_search
>>>>>>> user function on an old relax version.  Could you check if you are
>>>>>>> running the latest:
>>>>>>>
>>>>>>> $ relax -i
>>>>>>>
>>>>>>> This is what I see with the last 3.1 relax release:
>>>>>>>
>>>>>>> """
>>>>>>>                                             relax 3.1.7
>>>>>>>
>>>>>>>                               Molecular dynamics by NMR data analysis
>>>>>>>
>>>>>>>                              Copyright (C) 2001-2006 Edward d'Auvergne
>>>>>>>                          Copyright (C) 2006-2014 the relax development 
>>>>>>> team
>>>>>>>
>>>>>>> This is free software which you are welcome to modify and redistribute
>>>>>>> under the conditions of the
>>>>>>> GNU General Public License (GPL).  This program, including all
>>>>>>> modules, is licensed under the GPL
>>>>>>> and comes with absolutely no warranty.  For details type 'GPL' within
>>>>>>> the relax prompt.
>>>>>>>
>>>>>>> Assistance in using the relax prompt and scripting interface can be
>>>>>>> accessed by typing 'help' within
>>>>>>> the prompt.
>>>>>>>
>>>>>>> Processor fabric:  Uni-processor.
>>>>>>>
>>>>>>> relax> minimise.grid_search()
>>>>>>> Traceback (most recent call last):
>>>>>>>   File "<console>", line 1, in <module>
>>>>>>> AttributeError: 'Uf_object' object has no attribute 'grid_search'
>>>>>>> """
>>>>>>>
>>>>>>> Regards,
>>>>>>>
>>>>>>> Edward
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 28 November 2014 at 15:18, Boeszoermenyi, Andras
>>>>>>> <andras_boeszoerme...@hms.harvard.edu> wrote:
>>>>>>>> Hi Edward,
>>>>>>>>
>>>>>>>> I upgraded everything to newest.
>>>>>>>>
>>>>>>>> I tried to updated the script too, but when I run it I get this error 
>>>>>>>> message:
>>>>>>>>
>>>>>>>> File "/sw/lib/relax-py27/multi/processor.py", line 494, in run
>>>>>>>>     self.callback.init_master(self)
>>>>>>>>   File "/sw/lib/relax-py27/multi/__init__.py", line 318, in 
>>>>>>>> default_init_master
>>>>>>>>     self.master.run()
>>>>>>>>   File "/sw/lib/relax-py27/relax.py", line 194, in run
>>>>>>>>     self.interpreter.run(self.script_file)
>>>>>>>>   File "/sw/lib/relax-py27/prompt/interpreter.py", line 275, in run
>>>>>>>>     return run_script(intro=self.__intro_string, local=locals(), 
>>>>>>>> script_file=script_file, show_script=self.__show_script, 
>>>>>>>> raise_relax_error=self.__raise_relax_error)
>>>>>>>>   File "/sw/lib/relax-py27/prompt/interpreter.py", line 578, in 
>>>>>>>> run_script
>>>>>>>>     return console.interact(intro, local, script_file, 
>>>>>>>> show_script=show_script, raise_relax_error=raise_relax_error)
>>>>>>>>   File "/sw/lib/relax-py27/prompt/interpreter.py", line 477, in 
>>>>>>>> interact_script
>>>>>>>>     exec_script(script_file, local)
>>>>>>>>   File "/sw/lib/relax-py27/prompt/interpreter.py", line 352, in 
>>>>>>>> exec_script
>>>>>>>>     runpy.run_module(module, globals)
>>>>>>>>   File "/sw/lib/python2.7/runpy.py", line 180, in run_module
>>>>>>>>     fname, loader, pkg_name)
>>>>>>>>   File "/sw/lib/python2.7/runpy.py", line 72, in _run_code
>>>>>>>>     exec code in run_globals
>>>>>>>>   File 
>>>>>>>> "/Users/andrasboeszoermenyi/relax-trunk/test_suite/shared_data/curve_fitting/saturation_recovery/relax_sym.py",
>>>>>>>>  line 106, in <module>
>>>>>>>>     minimise.grid_search(inc=11)
>>>>>>>> AttributeError: 'Uf_object' object has no attribute 'grid_search'
>>>>>>>>
>>>>>>>> Not sure if that could be related to my recent upgrade to Yosemite, 
>>>>>>>> but I think it shouldn't.
>>>>>>>>
>>>>>>>> I uploaded the project as:
>>>>>>>>
>>>>>>>> file #22996:  saturation_recovery.tar.gz
>>>>>>>>
>>>>>>>> Best,
>>>>>>>> Andras
>>>>>>>>
>>>>>>>> ________________________________________
>>>>>>>> From: edward.dauver...@gmail.com [edward.dauver...@gmail.com] On 
>>>>>>>> Behalf Of Edward d'Auvergne [edw...@nmr-relax.com]
>>>>>>>> Sent: Thursday, November 27, 2014 1:16 PM
>>>>>>>> To: Boeszoermenyi, Andras
>>>>>>>> Cc: relax-devel@gna.org; Sébastien M
>>>>>>>> Subject: Re: [sr #3195] Fitting of saturation recovery experiment
>>>>>>>>
>>>>>>>> Hi Andras,
>>>>>>>>
>>>>>>>> I have now included your files in relax
>>>>>>>> (http://article.gmane.org/gmane.science.nmr.relax.scm/24542).  If you
>>>>>>>> have the trunk source code copy of relax and type:
>>>>>>>>
>>>>>>>> $ svn up
>>>>>>>>
>>>>>>>> You will see the files appear in the
>>>>>>>> test_suite/shared_data/curve_fitting/saturation_recovery directory.
>>>>>>>> If you could update your script for the latest relax version, I could
>>>>>>>> add it to the test_suite/system_tests/scripts/ directory.  This would
>>>>>>>> then be very simple to set up as a system test by duplicating and
>>>>>>>> modifying this test:
>>>>>>>>
>>>>>>>> http://www.nmr-relax.com/api/3.3/test_suite.system_tests.relax_fit-pysrc.html#Relax_fit.test_zooming_grid_search
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>>
>>>>>>>> Edward
>>>>>>>>
>>>>>>>>
>>>>>>>> On 27 November 2014 at 19:06, Edward d'Auvergne <edw...@nmr-relax.com> 
>>>>>>>> wrote:
>>>>>>>>> Hi Andras,
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> ok I uploaded a tar file with synthetic peaks for one spin system:
>>>>>>>>>>
>>>>>>>>>> file #22989
>>>>>>>>>
>>>>>>>>> Cheers!  The permanent link to the file is
>>>>>>>>> http://gna.org/task/download.php?file_id=22989, and this is attached
>>>>>>>>> to the task #7415 (http://gna.org/task/?7415).
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> The saturation recovery formula is:
>>>>>>>>>>
>>>>>>>>>>  I0*(1 - exp(?R1*t))
>>>>>>>>>>
>>>>>>>>>> The parameters I used were
>>>>>>>>>>
>>>>>>>>>> I0 = 1000000000000000.00
>>>>>>>>>>
>>>>>>>>>> and
>>>>>>>>>>
>>>>>>>>>> R1 = 0.5
>>>>>>>>>
>>>>>>>>> I'm wondering if this equation is correct.  Should this not be:
>>>>>>>>>
>>>>>>>>> I(t) = I_inf*(1 - exp(?R1*t))
>>>>>>>>>
>>>>>>>>> Is the magnitisation not returning to the steady-state of I_inf?  I
>>>>>>>>> guess that in this experiment I0 == I_inf.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> Obviously, the same numbers also work for the inversion recovery 
>>>>>>>>>> experiment:
>>>>>>>>>>
>>>>>>>>>> I(t) = I? ? I0*exp(?R1*t)
>>>>>>>>>>
>>>>>>>>>> with I? set to 1000000000000000.00 as well. Not sure how much that 
>>>>>>>>>> helps though.
>>>>>>>>>
>>>>>>>>> If I0 is set to something less than I_inf, this would give different
>>>>>>>>> I(t) values.  Such a data set could be used to implement the inversion
>>>>>>>>> recovery experiment.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> If "inv" is not implemented, then that would explain the weird 
>>>>>>>>>> results :)
>>>>>>>>>
>>>>>>>>> More of a warning is probably required.  Or a synthetic data set,
>>>>>>>>> relax script, and system test created, and then this equation finally
>>>>>>>>> implemented.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> Unfortunately, I have no primary reference for the saturation 
>>>>>>>>>> recovery experiment either.
>>>>>>>>>
>>>>>>>>> It's a pity.  The ancient primary references for all these basic and
>>>>>>>>> old experiment types would be great for adding to the relax manual and
>>>>>>>>> user function documentation.  I can see that lots of people discuss
>>>>>>>>> this older method, but I also don't see any references.
>>>>>>>>>
>>>>>>>>> I was wondering if you were able to update to the latest version of
>>>>>>>>> relax (3.3.3 at http://www.nmr-relax.com/download.html#Mac_OS_X), or
>>>>>>>>> even better to use the relax trunk source code
>>>>>>>>> (http://thread.gmane.org/gmane.science.nmr.relax.devel/3693/focus=7348).
>>>>>>>>> Could you try to update the scripts to run with these versions?  The
>>>>>>>>> newest relax versions will tell you how the user functions have been
>>>>>>>>> renamed.
>>>>>>>>>
>>>>>>>>> Cheers,
>>>>>>>>>
>>>>>>>>> Edward

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