GNU/Linux

Pre-compiled binary releases for GNU/Linux can be downloaded for both 32 bit (i686) and 64 bit (x86_64) machines.

Distribution package	MD5 checksum	GPG signature	File size (bytes)
relax-1.3.13.GNU-Linux.i686.tar.bz2	5655a892e4181de175b09be67a8d8506	signature	16057986
relax-1.3.13.GNU-Linux.x86_64.tar.bz2	541f901a483b32862bbe98d3c112317b	signature	15997206

Dependencies

If they exist, please install your distribution specific packages for the following dependencies.

• Python >= 2.5 (excluding >= 3.0): Python-2.6.6.tar.bz2
• NumPy >= 1.0.4: NumPy downloads
• SciPy (optional) >= 0.7.1: SciPy downloads
• wxPython (optional) >= 2.8: wxPython stable downloads

MS Windows

The pre-compiled binary release for 32 bit Windows can be downloaded from the link below.

Distribution package	MD5 checksum	GPG signature	File size (bytes)
relax-1.3.13.Win32.zip	88d953915673f3bcaaade41565a9357d	signature	18277838

Dependencies

• Python >= 2.5 (excluding >= 3.0): python-2.6.6.msi
• NumPy >= 1.0.4: NumPy downloads
• SciPy (optional) >= 0.7.1: SciPy downloads
• pyreadline >= 1.3: pyreadline-1.5-win32-setup.exe
• wxPython (optional) >= 2.8: wxPython stable downloads

System path

To execute relax, both the relax and Python installation directories will need to be added to the system path. For MS Windows the instructions for modifying the system path are given here.

Mac OS X

There are 3 ways of installing relax on a Mac. These are using the pre-compiled relax application, Fink or the source releases.

Stand-alone application

The stand-alone relax application requires none of the dependencies listed below to be installed. It is a universal binary compiled for i386, x86-64 and ppc64 (fat3) with the Mac OS X 10.5 framework. It should therefore run on most Mac OS X systems at or above version 10.5.

Distribution package	MD5 checksum	GPG signature	File size (bytes)
relax-1.3.13.Darwin.dmg	04ed984592ec1d51d40da15f21028fab	signature	128096286

Fink

Pre-compiled binary releases of certain relax versions are available for Mac OS X within the Fink project. These can be installed for Python 2.5 with the command:

> fink install relax-py25

The relax releases packaged within Fink can been browsed here. If the desired version is not available, please download the relevant source package below.

Dependencies

• Python >= 2.5 (excluding >= 3.0): python-2.6.6-macosx10.3.dmg
• NumPy >= 1.0.4: NumPy downloads
• SciPy (optional) >= 0.7.1: SciPy downloads
• wxPython (optional) >= 2.8: wxPython stable downloads

When using a 64-bit system, 64-bit compatible wxPython must be used, i.e. a version using the Cocoa API for implementing the GUI. Currently, this is only available for Python 2.7. One version can be downloaded here.

Source code release (for all other systems)

The program source, in which all functions except for relaxation curve fitting will be available without compilation, and associated GPG signatures (see the Security section below) can be downloaded from:

Distribution package	MD5 checksum	GPG signature	File size (bytes)
relax-1.3.13.src.tar.bz2	b6c41cef7055bc0f5bec0e0b66c51cb8	signature	15985739
relax-1.3.13.src.zip	1af666b0ca9c795f88e0d1227b5c4c10	signature	18324405

Dependencies

• Python >= 2.5 (excluding >= 3.0): Python 2.6.6 release page
• NumPy >= 1.0.4: NumPy downloads
• SciPy (optional) >= 0.7.1: SciPy downloads
• wxPython (optional) >= 2.8: wxPython stable downloads

Compilation

For compiling the C modules relax uses the SCons cross platform compilation tool. Building these modules is currently only required for the exponential curve fitting used to determine the R₁ and R₂ relaxation rates. By downloading and installing SCons and running the command:

> scons

in the relax base directory, the modules should automatically compile. This should work on all operating systems assuming that a C compiler is present. The Python header or development files also need to be installed. These files are installed with Python on MS Windows, but needs to be installed as a separate package often called something like python-devel on GNU/Linux and Mac OS X. If an error occurs on MS Windows, read the instructions here.

Development platforms

The development platform is required for compiling the C modules through SCons on MS Windows, for compiling the LaTeX manual, and generating relax distribution packages.