June 2011

R and citations

June 25, 2011 | David Firth

We’re hosting the international useR! conference at Warwick this summer, and I thought it might be interesting to try to get some data on how the use of R is growing. I decided to look at scholarly citations to R, mainly because I know where to find the relevant ... [Read more...]

R and citations by David Firth

June 25, 2011 | David Firth

We’re hosting the international useR! conference at Warwick this summer, and I thought it might be interesting to try to get some data on how the use of R is growing. I decided to look at scholarly citations to R, mainly because I know where to f... [Read more...]

Kernel Density Estimates & Truncated Normals

June 24, 2011 | ALT

Earlier today I read a post about truncated normals, and one plot in particular jumped out at me:By definition, the truncated normal should have zero density everywhere to the left of the truncation point, but that's not what we see in the plot. What'...
[Read more...]

RcppArmadillo 0.2.23

June 24, 2011 | Thinking inside the box

Conrad Sanderson released version 1.99.5 of Armadillo yesterday. This provides the fifth release candidate en route to version 2.0.0. He was even kind enough to post on rcpp-devel about it too as it entails some minor API changes. His version 1.99.5 ... [Read more...]

gretl

June 24, 2011 | Dave Giles

In comments on a recent post, "Ben" and Tal Galili very sensibly asked if I could make R code available for the econometric analysis in my posts, in addition to EViews code. I'll be trying to do this wherever I can, given the time constraints.The important point implicit in ... [Read more...]

The R Journal: June 2011

June 24, 2011 | David Smith

The latest issue of the R Journal is out, and as always includes many useful articles about using R and R packages. Articles in Volume 3/1 dive into topics including creating test for R packages with test_that; dealing with times, time zones, dates and holidays with timeDate; social network analysis ... [Read more...]

Drawing heatmaps in R

June 24, 2011 | Christopher Bare

A while back, while reading chapter 4 of Using R for Introductory Statistics, I fooled around with the mtcars dataset giving mechanical and performance properties of cars from the early 70's. Let's plot this data as a hierarchically clustered heatmap. # scale data to mean=0, sd=1 and convert to matrix mtscaled [Read more...]

Talking The R Journal latest release

June 24, 2011 | Pat

Volume 3/1 of The R Journal has been released. It of course has articles about using R.  In addition it has a feature that I highly support.  In preparation for the UseR! Conference 2011 August 16-18 in Coventry there are two Help Desk articles on making a good technical presentation. Technical presentation ...
[Read more...]

Multiple plots in R: lesson zero

June 24, 2011 | axiomOfChoice

Today, in one of my more productive days, I managed to create a sleek R script that plotted several histograms in a lattice, allowing for easy identification of the underlying trend. Although the majority of the time taken consisted of collecting the data and making various adjustments, it took a ... [Read more...]

msg <- "Hello World!"; print(msg)

June 23, 2011 | Rock 'n' R » R

Introduction My mom always told me to be polite so I think I should introduce myself first. I’m a 20+ years old Finnish university student studying computer science (2nd year starting) and statistics (first year coming) and mostly interested in &... [Read more...]

Table hockey and statistics, part 1

June 23, 2011 | Rock 'n' R » R

Two hobbys combined I’ve been playing table hockey for little over 8 years now and since the very beginning I’ve been interested in statistics and different software we use while organising tournaments and seasons. I’ve been writing f... [Read more...]

The R Journal, Volume 3/1

June 23, 2011 | Joshua Ulrich

The most recent issue of The R Journal was recently published.  If you're not a regular reader, you should at least check out the following three contributed articles (listed in order of appearance).Rmetrics - timeDate PackageDifferential Evoluti... [Read more...]

Speed up R "for" loops 50x with Rcpp

June 23, 2011 | David Smith

Christian Gunning has a great example of using Rcpp to speed up a for loop in R. For his agent-based simulation, Christian needed to repeatedly call the rbinom function in a loop. (Unfortunately, you can't pass a vector to the size argument, which would have solved the problem.) Using the ... [Read more...]

Inheriting in Items

June 23, 2011 | ellbur

What if we want to extend the behavior of one item with another? Or, to put it another way, what if we want one item to be able to grab the functionality of another? It turns out we can (almost) get this behavior without modifying the item constructor at all. ... [Read more...]

No, steal *this* blog!

June 23, 2011 | Adam.Hyland

Should the world of R Wikibooks require a precis on truncated distributions, marijuana prices, or an obtusely coded method to visualize orthogonal least squares (spoiler alert: dot products are easier!), I’m your man! I hereby release all of the content and code in the R stuff category under the ... [Read more...]
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