Follow-up Comment #1, bug #22021 (project relax):
A chi2 hypersurface was constructed over a map of 'dw', 'pA', 'kex'.
It is exemplified at.
http://wiki.nmr-relax.com/Dx_map
Data was created with:
model_create = MODEL_NS_CPMG_2SITE_EXPANDED
And minimised with:
model_analyse = MODEL_B14
sfrq_1 = 599.8908617*1E6
time_T2_1 = 0.06
ncycs_1 = [28, 4, 32, 60, 2, 10, 16, 8, 20, 50, 18, 40, 6, 12, 24]
sfrq_2 = 499.8908617*1E6
time_T2_2 = 0.04
ncycs_2 = [20, 16, 10, 36, 2, 12, 4, 22, 18, 40, 14, 26, 8, 32, 24, 6, 28 ]
With spin dynamics created with:
'r2' = 20 rad /s.
'kex' = 2200.0
'dw' = 1.5.
The chi2 surface mapped on the 3 dimensions. shows a highly alarming profile.
(file #20681, file #20682, file #20683, file #20684)
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Additional Item Attachment:
File name: pA_kex.png Size:64 KB
File name: kex_pA_dw.png Size:114 KB
File name: pA_dw.png Size:38 KB
File name: dw_kex.png Size:68 KB
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[bug #22021] Model B14 shows bad fitting to data.