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Relax 3.3.0

376 bytes added, 09:57, 4 September 2014
→‎Description: Expanded the dispersion speed up description.
= Description =
This is a major feature release which includes a huge number of changes, as can be seen below. The most important change is a massive an incredible speed up of all relaxation dispersion models - see . See the table below for a comparison to the previous relax release (3.2.3). Troels Linnet has taken advantage of linear algebra operations to the maximum extent possible to obtain the absolute fastest algorithms. As this is using numpy to avoid all Python looping, conversion to C or FORTRAN will not result in a significant speed advantage. With these incredible speed ups, relax should now be by far the fastest dispersion software out there. Other important features include the implementation of a zooming grid search algorithm to be used in all analysis types, improved plotting of R1rho values in the relaxation dispersion analysis, the ability to optimise the R1 parameter in all off-resonance dispersion models, proper minimisation statistics resetting by the minimisation user functions, and the expansion of the periodic table information in the relax library for better estimating molecular masses. Additional features are that there is better tab completion support in the prompt UI for Mac OS X, the addition of the 'time' user function for printing the current date and time, the value.copy user function accepting a force argument for overwriting values, model nesting in the dispersion auto-analysis has been extended, the spin-lock offset is now shown in the dispersion analysis in the GUI, the relax_disp.r2eff_estimate user function has been added for fast R2eff and I0 parameter value and error estimation, and gradients and Hessians have been added to the exponential curve-fitting C module allowing more advanced optimisation in the relaxation curve-fitting and dispersion analyses.
Note that this new 3.3 relax series brakes compatibility with old relax scripts. The important change, which is the main reason for starting the relax 3.3.x line, is the renaming of the calc, grid_search and minimise user functions to minimise.calculate, minimise.grid_search and minimise.execute respectively. Please update your scripts appropriately.
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