October 2012

Fractals and Kronecker product

October 17, 2012 | arthur charpentier

A few years ago, I went to listen to Roger Nelsen who was giving a talk about copulas with fractal support. Roger is amazing when he gives a talk (I am also a huge fan of his books, and articles), and I really wanted to play with that concept ... [Read more...]

Twitter Analysis of the US Presidential Debate

October 17, 2012 | stathack

The following are word clouds of tweets for each candidate from the October 16, 2012 debate with the bigger words the more often they were used in tweets (click on each word cloud to enlarge): And the net-negative posts for each candidate: Please note that the bigger the word is in the ... [Read more...]

9 reasons to use RStudio

October 16, 2012 | benjaminlmoore

In no particular order, here are nine reasons why I really like the RStudio IDE for the R statistical programming language. 1) R benefits from an IDE – I accept that in some languages an IDE is unnecessary—Perl is the first example … Continue reading → [Read more...]

An R Book for the Rest of Us

October 16, 2012 | Andrew Barr

R for Dummies is here!  Initial reviews are very positive for this book (I haven't gotten it yet).  I am very hopeful though, because the word on the street is that it doesn't assume you have any programming knowledge or much statistical know... [Read more...]

Life on the Big International Frontier

October 16, 2012 | klr

Although I have used the Kenneth French data library extensively in various posts, I have not yet used the international data sets paired with the wonderful paper. Eugene F. Fama and Kenneth R. French (2012) "Size, Value, and Momentum in International...
[Read more...]

R at 12,000 Cores

October 16, 2012 | wrathematics

I am very happy to introduce a new set of packages that has just hit the CRAN. We are calling it the Programming with Big Data in R Project, or pbdR for short (or as I like to jokingly refer to it, 'pretty bad for dyslexics'). You can find out ... [Read more...]

Flag space: a scatter plot of raster images

October 16, 2012 | is.R()

(Click for a bigger version) I’m not sure when plotting raster images in an R scatter plot will end up being useful. It’s not something I expect to need to do in my day-to-day research, and I think in general probably adds more complexity ... [Read more...]

Getting taxonomic names downstream

October 16, 2012 | Recology - R

It can be a pain in the ass to get taxonomic names. For example, I sometimes need to get all the Class names for a set of species. This is a relatively easy problem using the ITIS API (example below). The much harder problem is getting all the taxono... [Read more...]

Not Much of a Grand Finale. What if We Go To 0?

October 15, 2012 | klr

When I ask the question “What if the US 10 year goes to 0?", most do not know the effect, the catalyst, or if 0 has ever happened before.  The math is fairly simple to do in Excel or with an old-school calculator, but let’s use RQuantLib to do...
[Read more...]

Ready-made model comparison tables for journals

October 15, 2012 | David Smith

If you're reporting on the results of a statistical analysis for a journal or report, you'll probably be building a table comparing two or models. Such tables may include variables in the model, parameter estimates, and p-values, and model summary statistics. If you want to include such tables based on ... [Read more...]

MCMSki IV (call for proposals)

October 15, 2012 | xi'an

The next MCMSki IV conference will for the first time host contributed sessions as well as invited sessions. The scientific committee thus welcomes proposals for contributed talks and even more for contributed sessions. Contributed talks are scheduled to last 20 minutes, plus questions, and contributed sessions one hour and a half, ... [Read more...]

ggplot2 primer in 10 minutes

October 15, 2012 | Robert

Here’s a nice presentation from Christophe Ladroue which really does give an insight into the R package ggplot2 if you’ve never used it before. Each line of code can be clicked on to reveal the corresponding graph! [Read more...]

Presentation: Animated graphs in R

October 15, 2012 | Robert

As animatedgraphs.co.uk takes shape, and following the great reception it got at the Stata Users Group in London in September, I’m pleased to announce I will be giving the same presentation – for R this time – at the LondonR … Continue reading → [Read more...]
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