Sometimes the story isn't what is a trend, but rather what is not a trend. In this second installment about body weight in the U.S., listing what doesn't seem to be contributing factors will help narrow down what might actually be the p...

AbstractVarious approaches exist to relate saturated hydraulic conductivity (Ks) to grain-size data. Most methods use a single grain-size parameter and hence omit the information encompassed by the entire grain-size distribution. This study compares two data-driven modelling methods—multiple linear regression and artificial neural networks—that use the entire grain-size distribution data as input for Ks prediction. Besides the predictive capacity of the methods,...

In case you missed them, here are some articles from May of particular interest to R users. R tops the annual KDNuggets Data Mining Software poll for the first time. R 2.15.1 is scheduled for June 22. (Revolution R Enterprise 6, released on June 5, is based on 2.14.2.) A tutorial uses R, Hadoop, and the RHadoop project to...

How to order bars in bar graph (Stack Overflow FAQ)

Hi, our group of R users from INSEE, aka FLR, meets monthly in Paris. Next meeting is on Wed 13 (tomorrow), 1-2 pm, room 539 (an ID is needed to come in, map to access INSEE R), about ggplot2 and parallel computing. Since the first meeting in February, presentations have included hot topics like webscrapping, C in R, RStudio, SQLite

6/18: A follow-up to this post is now available here.Recent DiscoveriesWhen I was a diplomat, I was always interested in the Wikileaks cables and what could be done with them. Unfortunately, I never got a chance to look at the site in depth, due to security policies. Now that the ex- is firmly prepended to diplomat...

6/18: A follow-up to this post is now available here. Recent Discoveries When I was a diplomat, I was always interested in the Wikileaks cables and what could be done with them. Unfortunately, I never got a chance to look at the site in depth, due to security policies. Now that the ex- is firmly prepended to diplomat in my...

http://www.twotorials.com/Heres a fun little page!About 90 two minute tutorials (twotorials, haha) on various things in R!From "what does object oriented programming mean" to calculating the number of days youve been alive.The guy has an amusing voice too!!Great for newbies to R I should imagine!!!Have a look!!

Frequently we will want to estimate the empirical probability density function of real-world data and compare it to the theoretical density from one or more probability distributions. The following example shows the empirical and theoretical normal density for EUR/USD high-frequency … Continue reading →

6/18: A follow-up to this post is now available here.Recent DiscoveriesWhen I was a diplomat, I was always interested in the Wikileaks cables and what could be done with them. Unfortunately, I never got a chance to look at the site in depth, due to security policies. Now that the ex- is firmly prepended to diplomat in my...

The videos from 'Tiki + PluginR' workshop given in Madrid (Nov'12) in the context of the "3as Jornadas de Usuarios de R en Castellano" are available online. See it within the page of the fulll workshop: 2011. Taller 5: Crea interfaces Web 2.0 a tus programas en R con software libre (LAMP + Tiki + PluginR)....

Just had supper. My stomach is full of cabbage, carrot and noodle. I’d like to solve the ninth problem to stretch my mind. This one is about Pythagorean theorem. A Pythagorean triplet is a set of three natural numbers, a < b < … Continue reading →

Why study networks? Development and aid projects these days are more and more often focussing on supporting networks, so tools to analyse networks are always welcome. In this post I am going to present a very easy-to-use package for the stats program R which makes nice-looking graphs of these kinds of networks. In a recent

In Tiki9 icons and some other image paths have been refactored to share a common base folder. PluginR up to version 0.73 was using only paths from Tiki up to Tiki8. PluginR version 0.74 includes the icon also in the new path, so that it can be insta...

Here is a little overview on GenABEL library developed by Yurii Aulchenko (www.genabel.org/). GenABEL is a full-featured R library for dealing with Genome-Wide Association analysis of binary and quantitative traits. Compared to the ‘genetics’ package and many other tools, GenABEL … Continue reading →