Month: August 2013

Using LyX for a report

Andrei KNo Comments

LyX is a very simple and WSYG editor for latex documents, pretty well adapted to the new users, but enclosing the full power of Latex editors (and especially the freedom from all the options distraction that normal WSYG text editors are full of). However it’s first use might require some googling, so here is a couple of tips to speed up the proces:

inserting the references from Mendeley: http://onhavingwords.wordpress.com/2013/03/19/mendeley-lyx/

The margins should be set to 0.98” in order to reproduce the look and feeling of the MS Word / LO Writer.

Installing scikit.sparse on CentOS or Fedora

Andrei KNo Comments

Step 1: install the METIS library:

1 ) Install cmake as described here:

http://pkgs.org/centos-6-rhel-6/atrpms-testing-x86_64/cmake-2.8.4-1.el6.x86_64.rpm.html,

For the lazy:

– Dowload the latest atrpms-repo rpm from

http://dl.atrpms.net/el6-x86_64/atrpms/stable/

– Install atrpms-repo rpm as an admin:

# sudo rpm -Uvh atrpms-repo*rpm

– Install cmake rpm package:

# yum --enablerepo=atrpms-testing install cmake

2) Install either the GNU make with

# yum install make

or the whole Development tools with

# yum groupinstall "Development Tools"

3) Download METIS from http://glaros.dtc.umn.edu/gkhome/metis/metis/download and follow the instructions in the “install.txt” to actually install it:

– adjust the include.metix.h to adjust the length of ints and floats to better correspond to your architecture and wanted precision (32 or 64 bits)

-execute:

$ make config 
$ make 
# make install

Step 2: Install SuiteSparse:

1) Download the latest version from http://www.cise.ufl.edu/research/sparse/SuiteSparse/, untar it and cd into it

2) Modify the SuiteSparse_config.SuiteSparse_config.mk INSTALL_INCLUDE variable :

INSTALL_INCLUDE = /usr/local/include

3) Build and install it

$ make 
# make install

Step 3: Install the scikit.sparse:

1) Download the latest scikit.sparse from PiPy:

2) in setup.py edit the last statement so that it looks like this:

Extension("scikits.sparse.cholmod",
         ["scikits/sparse/cholmod.pyx"],
         libraries=["cholmod"],
         include_dirs=[np.get_include()].append("/usr/local/include"),
         library_dirs=["/usr/local/lib"],
),

Step 4:

Well, the scikit.sparse imports well at this point, but if we try to import scikits.sparse.cholmod, we have an Import error, where our egg/scikits/sparse/cholmod.so fails to recognize the amd_printf symbol….

Hmmm. Looks like there is still work to be done to get it all working correctly…