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Welcome to the relax Wiki.
The community-run support site for relax, a program for the study of molecular dynamics using experimental NMR data.
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News & Updates
Gna! is permanently shut down! A migration to another open source infrastructure is planned. This will include web hosting for, source code repositories, bug and other trackers, new reports, download pages, and possible a svn to git conversion.
Tutorial added Tutorial for sorting data stored as numpy to on-resonance R1rho analysis
Version 4 of relax With the latest relax release merging in years of developments in the frame order analysis, the major number has been incremented to relax 4.
Tutorial added Tutorial for manual regarding the relaxation dispersion auto-analysis in the GUI
Tutorial added Tutorial for R1/R2 Relaxation curve-fitting analysis on varian recorded as fid interleaved
Matplotlib example added Matplotlib example
Tutorial added Relaxation dispersion analysis R1_rho recorded on varian
Tutorial added Relaxation dispersion analysis cpmg fixed time recorded on varian as fid interleaved
Tutorial added Adding relaxation dispersion models to relax
wiki namespace changed The wiki is now placed at: as of 19 of July 2013
GPL License The License has been changed to GPL v3.
New Wiki This is the new wiki
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Relax 1.2.3

Official relax releases
relax logo
relax version 1.2.3
Previous version Next version
← relax 1.2.2 relax 1.2.4 →

Keywords Relaxation curve-fitting
Release type Major bugfix
Release date 1 March 2006

The PDF version of the relax 1.2.3 user manual The relax 1.2.3 user manual


This is a bug fix release which corrects a segfault crash of the exponential relaxation curve-fitting modules. The bug was introduced by the shift from the makefile to Sconstruct build system. The full descriptions of all bug fixes are:

  • Sconstruct now does not use the '-fPIC' option during compilation which caused the exponential relaxation curve-fitting modules to segfault.
  • The distribution binary and source file creation Sconstruct functions now properly compress the archives.
  • The printout of the ..→
Random screenshots
relax starting interface
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Steady-state NOE analysis
R1 analysis
R2 analysis
Model-free analysis
The relax controller
Spin viewer window
Results viewer window
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relax prompt window
About GUI screen
About relax screen