June 2011

Further Bernoulli factories

June 15, 2011 | xi'an

Yesterday, Andrew Thomas and José Blanchet posted a note on the Bernouilli factory on arXiv. This short paper links with the recent paper of Flegal and Herbei I commented earlier. Considering the special target Thomas and Blanchet develop an elaborate scheme of cascading envelopes that converge to f from above. ... [Read more...]

The Big Analytics Revolution starts with R

June 15, 2011 | David Smith

Thanks to everyone who attended our webinar The 'Big Analytics' Revolution Starts with R yesterday. If you missed the live session, you can download the presentation slides (PDF) and the 30-minute replay video (WMV) from the Revolution Analytics website. The presentation focuses on the isse of Big Data, and how ... [Read more...]

Statistical Analysis of the LAC Degerloch Volkslauf 2010

June 15, 2011 | Simon

Inspired by a post by a R-blogger my interest was piqued to examine the runs in my athletic club. Therefore, I started R and analysed he LAC Degerloch Volkslauf 2010; a 10km race near Stuttgart-Hoffeld. Next lines, I present this statistical examination. The data can be found at: data. Firstly, I ... [Read more...]

Sachin Tendulkar’s longevity

June 15, 2011 | prasoonsharma

There have been over 3300 cricketers who've played Test and One Day cricket. The youngest player was 14 years old Hasan Raza from Pakistan who played 5 ODIs and 2 Test matches at that age. The oldest player was 52 years old&nbs... [Read more...]

sas7bdat database reader update

June 14, 2011 | BioStatMatt

An earlier post (1216) introduced a compatibility study (i.e. reverse engineering) of the sas7bdat database file format. The code and documentation for this are here: http://github.com/biostatmatt/sas7bdat. I've recently restructured the code as an R package, and added some functionality. Look for the sas7bdat ... [Read more...]

Hot Job in IT: Data Science

June 14, 2011 | David Smith

CIO Magazine today has an article on the "6 Hottest New Jobs in IT" in which features Data Science and R at #2: "There's now an intellectual consensus in business that the only way to run an enterprise is to use analytics with data scientists to find opportunities," says Norman Nie, CEO ... [Read more...]

Wilcoxon Champagne test

June 14, 2011 | Julyan Arbel

As an appetizer for Paris triathlon, Jérôme and I ran as a team last week-end an adventure racing in Champagne region (it mainly consists in running, cycling, canoeing, with a flavor of orienteering, and Champagne is kept for the end). It was organized by Ecole Polytechnique students who, ... [Read more...]

REIT Momentum in Quantstrat

June 14, 2011 | klr

I took a short break from quantstrat to do some REIT analysis REITs for Everybody Might Now Mean REITs for Nobody.  Now let’s link the two by incorporating The Aleph Blog momentum bucket strategy in quantstrat. From TimelyPortfolio In ...
[Read more...]

Boxplots without boxes

June 14, 2011 | Gregor

Let’s say you have several categories with multiple data points each that you would like to plot as individual points. Even if you have only a single point, the R graphics package will plot a line (without a box for … Continue reading → [Read more...]

No lake is an island: PhD Opportunity

June 14, 2011 | ucfagls

NERC recently funded the formation of the UK Lake Ecological Observation Network (UKLEON) as part of the its Networks of Sensors programme. UKLEON is lead by Ian Jones at CEH Lancaster. A fully-funded PhD project is associated with the UKLEON … Continue reading → [Read more...]

Dependence and Correlation

June 13, 2011 | ALT

In everyday life I hear the word "correlation" thrown around far more often than "dependence." What's the difference? Correlation, in its most common form, is a measure of linear dependence; the catch is that not all dependencies are linear. The set...
[Read more...]

Asians Love Their Bandwidth

June 13, 2011 | Raghav

I recently ran across some data from comScore networks. The data contains results from surveys from a number of households across the US with demographic information (ethnicity, household income, household size, state, zipcode, etc.) along with whether... [Read more...]

Sweave source for poll report

June 13, 2011 | jackman

Sweave source for the poll report for those who expressed some interest. You’ll also need this file of R function definitions, utilities.R. I also wrote a little shell script that calls Sweave and xelatex etc, hacking the Sweave.sh script that ships with R. [Read more...]

Donor analysis in R – Smith for Congress

June 13, 2011 | jjh

In a previous post I introduced the Smith for Congress data set. The data is 49k contributions made by individuals to a congressional campaign for the 2006-2010 electoral cycles. Smith for Congress is not the name of the actual campaign. Individual contributions are not required to be disclosed by a ... [Read more...]

Example 8.40: Side-by-side histograms

June 13, 2011 | Ken Kleinman

It's often useful to compare histograms for some key variable, stratified by levels of some other variable. There are several ways to display something like this. The simplest may be to plot the two histograms in separate panels.SASIn SAS, the most d...
[Read more...]
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