Monthly Archives: November 2010

Forecast estimation, evaluation and transformation

November 9, 2010
By
Forecast estimation, evaluation and transformation

I’ve had a few emails lately about forecast evaluation and estimation criteria. Here is one I received today, along with some comments. I have a rather simple question regarding the use of MSE as opposed to MAD and MAPE. If the parameters of a time series model are estimated by minimizing MSE, why do we

Read more »

Particle learning [rejoinder]

November 9, 2010
By
Particle learning [rejoinder]

Following the posting on arXiv of the Statistical Science paper of Carvalho et al., and the publication by the same authors in Bayesian Analysis of Particle Learning for general mixtures I noticed on Hedibert Lopes’ website his rejoinder to the discussion of his Valencia 9 paper has been posted. Since the discussion involved several points

Read more »

Any R packages to solve Vehicle Routing Problem?

November 9, 2010
By
Any R packages to solve Vehicle Routing Problem?

Are there any R packages to solve Vehicle Routing Problem (VRP)?I looked around but could not find any... Any leads?VRP is a classic combinatorial optimization challenge and has been an active area of research for operations research gurus fo...

Read more »

Any R packages to solve Vehicle Routing Problem?

November 9, 2010
By
Any R packages to solve Vehicle Routing Problem?

Are there any R packages to solve Vehicle Routing Problem (VRP)?I looked around but could not find any... Any leads?VRP is a classic combinatorial optimization challenge and has been an active area of research for operations research gurus fo...

Read more »

R co-creator Ross Ihaka wins Lifetime Achievement Award in Open Source

November 9, 2010
By

The co-creator of R, University of Auckland Associate Professor of Statistics Dr. Ross Ihaka, was yesterday awarded the Catalyst Lifetime Achievement in Open Source Award at the 2010 New Zealand Open Source Awards. From the announcement: Dr. Ihaka is one of the originators of the world-renown ‘R’ programming language and software environment for statistical computing and graphics. In 2008...

Read more »

Promote your favorite R functions

November 9, 2010
By

The 27 base and recommended libraries of the standard R 2.12 distribution together contain 3556 functions (you can check using the code posted after the jump). Many of the functions are commonly used: c, data.frame, rnorm, lm. But some of those functions, while being extremely useful, may be less well known to many R users. Some examples I'd wish...

Read more »

New R User Group in Houston

November 9, 2010
By

The latest local R user group to form is located in Houston, Texas. The first meeting of the Houston R Users Group is tonight at Rice University (in conjunction with the Houston chapter of the ASA). R hackr (typo intended!) Hadley Wickham will be giving a presentation on writing R packages, and you can check out the slides on...

Read more »

Mapping drug war related homicides in 2010

November 9, 2010
By
Mapping drug war related homicides in 2010

There have been some very good visualizations of the Wikileaks data so I decided to create one of the drug war in Mexico The above map was made using data collected by Walter McKay, mainly from El Universal and El Diario reports. The data is stored as a Google Map...

Read more »

Mapping drug war related homicides in 2010

November 9, 2010
By
Mapping drug war related homicides in 2010

There have been some very good visualizations of the Wikileaks data so I decided to create one of the drug war in Mexico The above map was made using data collected by Walter McKay, mainly from El Universal and El Diario reports. The data is stored as a Google Map...

Read more »

The ARORA guessing game

November 9, 2010
By
The ARORA guessing game

The game ARORA (A random or real array) is a website that gives you two time series at a time. Your job is to guess which series is real market data and which is permuted data.  It’s fun — try it. With some practice you will probably be able to guess which is which well … Continue reading...

Read more »

Sponsors

Mango solutions



RStudio homepage



Zero Inflated Models and Generalized Linear Mixed Models with R

Quantide: statistical consulting and training



http://www.eoda.de









ODSC

CRC R books series











Contact us if you wish to help support R-bloggers, and place your banner here.

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)