Hi again, It seems that the tutorial you linked only applies for supporting data from new experiments to dispersion analysis and not for model-free analysis? Is adding experiments for model-free analysis done in a similar fashion? As for your listed requirements, I have experimental data and I can rather easily generate synthetic data. The eta_xy equation is number (2) in: Longitudinal and Transverse 1H−15N Dipolar/15N Chemical Shift Anisotropy Relaxation Interference: Unambiguous Determination of Rotational Diffusion Tensors and Chemical Exchange Effects in Biological Macromolecules Christopher D. Kroenke,†, J. Patrick Loria,†, Larry K. Lee,†, Mark Rance,*,‡ and, and Arthur G. Palmer, III*,† Journal of the American Chemical Society 1998 120 (31), 7905-7915 DOI: 10.1021/ja980832l With regards, Sven Wernersson On 6 Apr 2017, at 11:10, Troels Emtekær Linnet <tlinnet@xxxxxxxxxxxxx<mailto:tlinnet@xxxxxxxxxxxxx>> wrote: Hi Sven Wernesson. Try read the wiki for guidelines to implement a new model http://wiki.nmr-relax.com/Tutorial_for_adding_relaxation_dispersion_models_to_relax To implement this feature, you need: * Equations for calculations (The target function) * Data to test on, and a "true" result (To verify the target function is functioning) * Which parameters should be fit (those to the target function) Best Troels Schwarz-Linnet 2017-04-04 18:08 GMT+02:00 Sven Wernersson <sven.wernersson@xxxxxxxxx<mailto:sven.wernersson@xxxxxxxxx>>: Hi, I have eta_xy data (the transverse cross-correlation relaxation rate constant) which I would like to include in my Model-free analysis. I don’t know much python, so would it be possible for any of you to help me implement support for this data type? If you do not have the time to directly implement support, I would also appreciate guidelines or similar help in how I could do it on my own. I am fairly experienced in using Matlab, so I might eventually be able to do it. Grateful for any help, Sven Wernersson _______________________________________________ relax (http://www.nmr-relax.com<http://www.nmr-relax.com/>) This is the relax-devel mailing list relax-devel@xxxxxxx<mailto:relax-devel@xxxxxxx> To unsubscribe from this list, get a password reminder, or change your subscription options, visit the list information page at https://mail.gna.org/listinfo/relax-devel