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== Installing the relax dependencies ==

=== RHEL 5 and compatible distributions ===

For RPM-based Linux distributions with access to the YUM installer, first install the relax dependencies with:
<source lang="bash">
yum install python
yum install python-devel
yum install numpy
yum install scipy
yum install python-matplotlib
yum install scons
yum install wxPython
yum install grace
</source>

If you do not have root access but are in the sudo group, you can type:
<source lang="bash">
sudo yum install python
sudo yum install python-devel
sudo yum install numpy
sudo yum install scipy
sudo yum install python-matplotlib
sudo yum install scons
sudo yum install wxPython
sudo yum install grace
</source>

The python-devel and scons packages are only required if the C modules need to be compiled for your system.  The [http://plasma-gate.weizmann.ac.il/Grace/ Grace] software is used for visualisation of 2D data sets.

=== Minfx and Bmrblib ===

The [[https://gna.org/projects/minfx/ minfx]] and [[https://gna.org/projects/bmrblib/ bmrblib]] libraries can be installed on all Linux systems by typing:
<source lang="bash">
wget http://download.gna.org/minfx/minfx-1.0.5.tar.gz
tar -xzf minfx-1.0.5.tar.gz
cd minfx-1.0.5
python setup.py install
cd ..

wget http://download.gna.org/bmrblib/bmrblib-1.0.3.tar.gz
tar -xzf bmrblib-1.0.3.tar.gz
cd bmrblib-1.0.3
python setup.py install
cd ..
</source>

== Testing the Python installation ==

Before installing relax, it is best to be sure that the Python modules are functional by importing them:
<source lang="python">
$ python
Python 2.6.6 (r266:84292, Oct 12 2012, 14:23:48)
[GCC 4.4.6 20120305 (Red Hat 4.4.6-4)] on linux2

>>> import wx
>>> wx.__file__
'...'

>>> import bmrblib
>>> bmrblib.__file__
'...'

>>> import minfx
>>> minfx.__file__
'...'
</source>

== Checking out a relax branch ==

If you would like to play with relax branch rather than the main [[http://www.nmr-relax.com/download.html relax downloads]], the [[http://subversion.tigris.org/ Subversion]] program should first be installed.  First the relax sources can be checked out of the source code repository and the C modules compiled:
<source lang="bash">
svn co svn://svn.gna.org/svn/relax/branches/relax_disp relax_disp
cd relax_disp
scons

# Optional building of the user manual, if a LaTeX installation is available.
scons user_manual_pdf
</source>

If the svn command does not work, try:
<source lang="bash">
svn co http://svn.gna.org/svn/relax/branches/relax_disp relax_disp
</source>

=== Add to path - C_shell / Tcsh ===
<source lang="bash">
cd relax_disp
echo "setenv PATH $PWD"':$PATH' >> $HOME/.cshrc
</source>

[[Category:Installation]]