relax 1.2.5

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relax version 1.2.5
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Keywords Model-free analysis
Release type Bugfix
Release date 20 July 2006

The PDF version of the relax 1.2.5 user manual The relax 1.2.5 user manual


This is mainly a bugfix release. A large number of bugs have been eliminated including bug #5977, bug #6288, bug #6383, bug #5806, bug #6384, bug #6388, bug #6389, and bug #5746. These are described in more detail below. To fix a few of these bugs large disruptive changes were required. This included the change of the local τm parameter name from 'tm' to 'local_tm' and the simplification of the model-free model_statistics() function and modification of the model-free calculate() function. Therefore regressions and new bugs may appear in this release, most likely when the local τm parameter is encountered or during model selection.


The new relax versions can be downloaded from If binary distributions are not yet available for your platform and you manage to compile the binary modules, please consider contributing these to the relax project (described in section 3.6 of the relax manual,


Version 1.2.5
(20 July 2006, from /1.2)



  • The distribution archives now unpack to the directory 'relax-x.x.x' rather than just 'relax', where x.x.x is the version number.
  • All chapters of the manual have been edited and proofed.
  • The Sparky and XEasy peak intensity reading functions have been split to allow the easy addition of new peak intensity file types.
  • Test of AIC model selection between diffusion tensors added to the test suite. (To catch bug #5746)
  • Changing of the local τm parameter name of 'tm' to 'local_tm' to distinguish it from the global tumbling time 'tm'. (Preparation for fixing bug #6384)



For reference, the following links are also part of the announcement for this release:


If you would like to receive announcements about new relax versions, please subscribe to the relax announcement mailing list. This list only receives ~10 emails per year. It is archived at the SourceForge archives and in The Mail Archive.

See also