In the past, I’ve described how one could build multiarch (64 bit and 32 bit) versions of R on a 64 bit Ubuntu machine. The method based on this thread no longer works as of R 2.13 or 2.14 I believe. I received advice from someone on #R over on freenode (forgot who) a few read more
I have the 64 bit version of R compiled from source on my Ubuntu laptop. I recently had a need for R based on 32 bit since a package I needed to compile and use only works in 32 bit. I thought it was readily available on Ubuntu since both 32 bit and 64 bit read more
The following are notes for myself. I like to use the [bleeding edge](http://cran.r-project.org/doc/manuals/R-admin.html#Using-Subversion-and-rsync) version of [R](http://www.r-project.org/):
I write code mainly in R, and from times to times, in C, C++, SAS, bash, python, and perl. There are style guides out there that help make your code more consistent and readable to yourself and others. [Here](http://geosoft.no/development/cppstyle.html) is a style guide for C++, and [here](http://google-styleguide.googlecode.com/svn/trunk/google-r-style.html) is Google’s style guide for R and [here](http://had.co.nz/stat405/resources/r-style-guide.html) read more
I use the [snow](http://cran.r-project.org/package=snow) package in R with [OpenMPI](http://www.open-mpi.org/) and [SGE](http://www.sge.com/) quite often for my simulation studies; I’ve [outlined](http://blog.nguyenvq.com/2010/01/20/scheduled-parallel-computing-with-r-r-rmpi-openmpi-sun-grid-engine-sge/) how this can be done in the past. The ease of [these](http://blog.nguyenvq.com/2010/01/20/scheduled-parallel-computing-with-r-r-rmpi-openmpi-sun-grid-engine-sge/) methods make it so simple for me to just specify the maximum number of cores available all the time. However, unless you own your read more
To determine the status of a queue in SGE, one can issue the command `qstat -g c` to get such information like number of CPU available and the current CPU and memory load. However, this information can be misleading when nodes can be cross-listed in multiple Q’s. A Q can say X number of nodes read more
I did this before on my Macbook, but never documented. Wanted to document my attempt on the [Mac virtual machine](http://blog.nguyenvq.com/2010/12/04/mac-os-x-in-linux-via-virtualbox-as-guest-os/). 1. Install Xcode (gcc/g++) and gfortran per [this](http://r.research.att.com/tools/) site. 2. Download the [R](http://www.r-project.org/) source file (2.12 in this example), and extract it. 3. `./configure` did not work (Fortran issue). Per [this](http://r.research.att.com/building.html), [this](http://www.mail-archive.com/r-sig-mac@stat.math.ethz.ch/msg04277.html), and [this](http://cran.r-project.org/doc/manuals/R-admin.html#Installing-R-under-Mac-OS-X), I read more
I’m not very familiar with S4 classes and methods, but I assume it’s the recommended way to write new packages since it is newer than S3; this of course is open to debate. I’ll outline my experience of programming with S4 classes and methods in a later post, but in the mean time, I want read more
Had to share [this](http://www.r-statistics.com/2010/09/managing-a-statistical-analysis-project-guidelines-and-best-practices/) link today as I better read all the content it refers to and incorporate a lot of the recommended practices into my work flow. Thanks Tal Galili for compiling all those information.
