Offering - the backbone of open source. The image is CC by TenthMusePhotography
This is part II of the previous package creation post. I've created my own CRAN repository since I wanted a quick upload. Perhaps in the future I'll post on the main server but right now...
Last week I wrote:This is actually a more difficult calculation (or I forgot too much probability). Luckily a bit of brute force comes in handy. To reiterate, in general simulated data shows 0.54 redraws because of the first person etc.colSums(countsto...
It has been just announced that during ESSA2013 conference I am planning to organize a special track on "Statistical analysis of simulation models". I hope to get some presentations using GNU R to promote it in social simulation community.
It is obvious that GNU R excels in analysis of simulation data. However, very often it can be neatly...
I write R scripts on both my laptop and desktop, so the main issue I have is making sure that the R scripts are updated on these devices. There are several ways to ensure this happens:Use a version control system (on the cloud), e.g GithubWrite R scrip...
Original Code# In order for us to understand what a Computer Adaptive Test (CAT) is, let's first think about how the CAT works.# A CAT test starts by having some kind of initial assessment of student ability (test taker's ability).# This is typically a...
It´s time to start developing some regressions in order to find the best math treatment, the best number of terms, the best spectral regions, the best regression method,....This time I´m working with the PLS package in R, and just to make ...
Josh Ulrich and Jeff Ryan mentored a Google Summer of Code (GSOC) project this summer focused on experimental functionality for xts in collaboration with R. Michael Weylandt, a student in operations research and financial engineering from Princeton. You might recognize Michael from his presentation at R/Finance this year, where he gave a talk entitled “A 
Here is a link to a wonderful ggplot2 tutorial: http://www.ceb-institute.org/bbs/wp-content/uploads/2011/09/handout_ggplot2.pdf by R. Saccilotto and the Basel Institute for Clinical Epidemiology …
I watched this video by Fernando Pérez a few days ago when I was reading a comment by James Correia Jr on Simply Statistics:
This is absolutely a fantastic talk that I recommend everybody to watch (it is good in both the form and content). Not surprisingly, I started thinking ipython vs knitr. Corey Chivers said we could...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
