[Ifeffit] Random behaviour Artemis 0.7.001

[Peter Pfalzer]

Hi all,

>>3. Sometimes the fit have no-sense values so I have to save the project,
>>rerun Artemis, and with the same parameters I obtain good fit. It seems
>>like after a certain number of fits the software starts to fail.
> 
> 
> This one I *have* seen.  My current hypothesis is that I am using ifeffit's 
> erase() command in a way that is flakey.  Unfortunately, I haven't been able 
> to come up with a simple enough demonstration of the problem to merit 
> complaining to Matt about it.  Indeed, I am not sure that erase() is really 
> the problem.  In any case, I changed how erase() is used in a few places in 
> the version I am currently working on and haven't seen this problem recently.  
> So, there is hope ;-)  In the meantime, I don't have better advice than to 
> save and restart.

I have also experienced the same problem when using "gifeffit", not artemis. 
Sometimes a "mutant" of this bug appears with the fit parameters staying okay, 
but the errors increasing with each fit attempt to enormous values. 
Unfortunately I also didn't find a cause -> effect relation until now.

Best, Peter


-- 
--------------------------------------------------------------
Peter Pfalzer
Universitaet Augsburg                    Tel: +49-821-598-3215
Lehrstuhl fuer Experimentalphysik II     Fax: +49-821-598-3411
Universitaetsstr. 1
D-86135 Augsburg
Germany                   Peter.Pfalzer at physik.uni-augsburg.de
             http://www.physik.uni-augsburg.de/exp2
--------------------------------------------------------------