2011

Package ‘intergraph’ (1.1-0) released!

September 20, 2011 | Michał

I just released the first official version of the ‘intergraph’ R package. With the functions provided in the current version (1.1-0) you can convert network data objects between classes ‘igraph’ and ‘network’. The package supports directed and undirected networks, and handles the node, tie, and network (graph) attributes. Mutliplex networks (... [Read more...]

Cricket All Round Performances

September 19, 2011 | Ralph

In cricket a player who can perform well with both the bat and bowl is a great asset for any team and across the history of international cricket there have been a number of cricketers that hall into this bracket. It is difficult to specify a set of criteria to ... [Read more...]

About commercial publishers

September 19, 2011 | xi'an

Julien Cornebise has [once again!] pointed out a recent Guardian article. It is about commercial publishers of academic journals, mainly Elsevier, Springer, and Wiley, with a clear stand from its title: “Academic publishers make Murdoch look like a socialist“! The valuable argument therein is that academic publishers make hefty profits (... [Read more...]

Using jri to connect JAVA to R

September 19, 2011 | George

The R package rJava allows R to be accessed in Java programs. The part of the package that allows this is jri. The notes on the rJava site about getting jri to work didn’t help me much getting it to … Continue reading → [Read more...]

Appendable saving in R

September 19, 2011 | mbq

One of the most crucial problems in HPC is that every error you make have much greater impact than in the normal computing — there is nothing more amusing than finding out that few-day simulation broke few minutes before the end because of an unfortunate value thrown by a random generator, ... [Read more...]

rgdal + raster + RCurl = My next package

September 18, 2011 | Steven Mosher

This package has been a long time in the making.  In the end it’s more of a data package than a functional package, but pulling all the pieces together required me to learn some really cool packages: raster ( which I already knew ) rgdal and RCurl.  I’ll provide a ... [Read more...]

DTW: dynamic time warping 动态时间规整

September 18, 2011 | Xianjun Dong

Basically, DTW (dynamic time warping) is an algorithm to output cumulative distance of two time sequences, which is widely used e.g. for classification and clustering.For example, when using k-mean for clustering, we can use DTW as distance function. Here is one of such nice instances (using R: http://... [Read more...]

Implementation of the CDC Growth Charts in R

September 17, 2011 | Todos Logos

I implemented in R a function to re-create the CDC Growth Chart, according to the data provided by the CDC.In order to use this function, you need to download the .rar file available at this megaupload link.Mirror: mediafire link.Then unrar the file, a... [Read more...]

littler 0.1.5

September 17, 2011 | Thinking inside the box

Brown-bag release time for littler. One of the minor cleanups in the 0.1.4 release from Thursday actually introduced a nasty little bug as you can't call Rf_KillAllDevices() when you do not have any graphics device. Doh. So with apologies for the l... [Read more...]

UK R Courses – 2012

September 17, 2011 | csgillespie

The School of Mathematics & Statistics at Newcastle University (UK), are again running some R courses. In January, 2012, we will run: January 16th: Introduction to R; January 17th: Programming with R; January 18th & 19th: Advanced graphics with R. The courses aren’t aimed at teaching statistics, rather they aim to go ... [Read more...]

Introduction to Beamer

September 17, 2011 | MK

A friend of mine, who is quite smart by the way (she is a PhD. student in Physics at Cambridge), recently asked me for some help with Beamer. Well most of my knowledge and code came from Utkarsh when I had started about a year ago. Initially, I ha...
[Read more...]

Elements of Bayesian Econometrics

September 16, 2011 | Matt Bogard

 posterior = (likelihood x prior) / integrated likelihoodThe combination of a prior distribution and a likelihood function is utilized to produce a posterior distribution.  Incorporating information from both the prior distribution and the likelihood function leads to a reduction in variance and an improved estimator. As n→ ∞ the likelihood centers over the ...
[Read more...]
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