A new version of the digest package (which generates hash function summaries for arbitrary (and possibly nested) R objects using any of the standard md5, sha-1, sha-256 or crc32 algorithms) is now on CRAN. Bryan Lewis, who is doing very stuff with ...
Monthly Archives: September 2011
Strangeloop 2011 Day 2
I’m headed back home from Strangeloop 2011 this morning. Once again I booked an early flight so was up at 4:45 to get to the airport (when will I learn?) The conference was a smashing success as far as I am concerned. It was extremely well run and the talks were full of solid content. 
Handbook of Markov chain Monte Carlo
At JSM, John Kimmel gave me a copy of the Handbook of Markov chain Monte Carlo, as I had not (yet?!) received it. This handbook is edited by Steve Brooks, Andrew Gelman, Galin Jones, and Xiao-Li Meng, all first-class jedis of the MCMC galaxy. I had not had a chance to get a look at 
More facebook and google plus on the Graph Gallery
Following up on yesterday's post about facebook like box, I've added some more social things into the gallery. The main page gains a google plus "plus one" button, and each graph page now has a +1 button, a facebook like button, and a facebook comm...
Simple plot using R
As a task for my Financial eco assignment I had to plot a simple time series of the overnight MIBOR(Mumbai interbank offer rates) for the past one year . The job could very well have been done easily in MS-Excel but I choose to plot it in R instea...
Project Euler: problem 3
The prime factors of 13195 are 5, 7, 13 and 29.What is the largest prime factor of the number 600851475143 ?This one was quite easy, and much easier in R as it turns out.The GNU Multi-Precision Library (GMP) is available as a package in R. So the only ...
Variogram fit with RPanel
During the UseR 2011 conference I saw lots of examples of the use of RPanel to create a GUI in R. Yesterday, because I was a bit bored of the work I was doing I started thinking about this and I decided to try this package.
My objective was to create a new panel with all the main setting for...
A Note on Antoniak’s Approximation for Dirichlet Processes
Antoniak's 1974 article titled Mixtures of Dirichlet Processes with Applications to Bayesian Nonparametric Problems (Annals of Statistics 2(6):1152-1174) is a fundamental work for most modern developments in this area. The article gives two expressions for the expected number of distinct values in a sample of size n, drawn from a Dirichlet process-distributed probability distribution with
Example 9.6: Model comparison plots (Completed)
We often work in settings where the data set has a lot of missing data-- some missingness in the (many) covariates, some in the main exposure of interest, and still more in the outcome. (Nick describes this as "job security for statisticians").Some ana...
Density exploration and Wang-Landau algorithms [with R package]
![Density exploration and Wang-Landau algorithms [with R package]](http://statisfaction.files.wordpress.com/2011/09/mixture4kweightedpoints.png?w=300&h=300)
Hey, Since a new paper that I’ve co-written has appeared on arXiv, here is a quick post summarizing it. The paper is named: An Adaptive Interacting Wang-Landau Algorithm for Automatic Density Exploration and describes improvements over the Wang-Landau algorithm described … Continue reading →
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
