June 2011

Topic Modeling the Sarah Palin Emails

June 27, 2011 | Edwin Chen

tl;dr Browse through Sarah Palin’s emails, automagically organized by topic, here. LDA-based Email Browser Earlier this month, several thousand emails from Sarah Palin’s time as governor of Alaska were released. The emails weren’t organized in any fashion, though, so to make them easier to browse, I ... [Read more...]

density()

June 27, 2011 | xi'an

Following my earlier posts on the revision of Lack of confidence, here is an interesting outcome from the derivation of the exact marginal likelihood in the Laplace case. Computing the posterior probability of a normal model versus a Laplace model in the normal (gold) and the Laplace (chocolate) settings leads ... [Read more...]

RghcnV3 version 1.1

June 27, 2011 | Steven Mosher

I’ve just uploaded version 1.1 of  the package RghcnV3 to Cran. I’ve made a few changes that should make it easier for some folks to use. First I removed the requirement for rgdal. At the present time “rgdal” is not required. On the MAC installing it can be a ... [Read more...]

Bonds Risk and Return by Rating

June 27, 2011 | klr

As an extension to the Bond Market as a Casino Game series and Historical Sources of Bond Returns-Comparison of Daily to Monthly, I thought a ggplot of risk and return by decade and Moody’s Rating might be helpful.  Anyone who has read those oth...
[Read more...]

New cloudnumbers.com release

June 27, 2011 | Markus

We are very proud to announce our cloudnumbers.com release number 5! In the last days we rolled out several releases and bug fixes. Cloudnumbers.com now supports many more features and has an optimized startup process. This is a list of our main and very important new features: Bioconductor packages ... [Read more...]

A Winking Pink Elephant

June 27, 2011 | Neil Gunther

The title of chapter 5 in my Guerrilla Capacity Planning book is, "Evaluating Scalability Parameters," and underneath it you'll see this quote:"With four parameters I can fit an elephant. With five I can make his trunk wiggle." —John von NeumannIn that vein, Guerrilla alumnus Stephen O'C. pointed me at a ... [Read more...]

googleVis library on use

June 26, 2011 | Rock 'n' R » R

Data on the map While surfing around the Internet I accidentally found the googleVis library for R and especially the gvisGeoMap-function which creates a map based on country data.  In a table hockey scene we have a great World Ranking … Continu... [Read more...]

RObjectTables are AWESOME

June 26, 2011 | ellbur

Why isn't everyone using the RObjectTables package? This is the best thing ever! Here's the basic idea of RObjectTables: An environment is an object where you can lookup names and associate them with values. And in particular its where you look up variables used in an expression. But there's no ... [Read more...]

Bayesian Fall school in La Rochelle

June 26, 2011 | xi'an

The French agronomy research institute INRA is organising a Fall school in La Rochelle, Nov. 28 – Dec. 02, on Bayesian methods, oriented towards the applications in food sciences, environmental sciences, and biology. The provisional program (in French) is ■ Initiation aux outils informatiques R et WinBUGS (TP et réalisation de projets sur ... [Read more...]

Generalized Linear Models – Poisson Regression

June 26, 2011 | Ralph

The Generalized Linear Model (GLM) allows us to model responses with distributions other than the Normal distribution, which is one of the assumptions underlying linear regression as used in many cases. When data is counts of events (or items) then a discrete distribution is more appropriate is usually more appropriate ... [Read more...]

GRIMS — General R Interface for Markov Sampling

June 25, 2011 | Radford Neal

I have released a (very) preliminary version of my new MCMC software in R, which I’m calling GRIMS, for General R Interface for Markov Sampling. You can get it here. This software differs from other more-or-less general MCMC packages in several respects, all but one of which make it, ... [Read more...]

Normal tail precision

June 25, 2011 | xi'an

In conjunction with the normal-Laplace comparison mentioned in the most recent post about our lack of confidence in ABC model choice, we have been working on the derivation of the exact Bayes factor and I derived an easy formula for the marginal likelihood in the Laplace case that boils down ... [Read more...]

ProjectTemplate News

June 25, 2011 | John Myles White

The news below was recently reported on the ProjectTemplate mailing list. For completeness, I’m also reporting it here. The first piece of ProjectTemplate news is that I won’t be the exclusive maintainer for ProjectTemplate anymore. Allen Goodman, who works at BankSimple, is now my co-maintainer and he has ... [Read more...]
1 2 3 4 12

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)