Converting Sweave LaTeX to knitr LaTeX: A case study

June 9, 2012
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The following post documents the steps I needed to take in order to convert a project using Sweave LaTeX into one using knitr LaTeX. Additional Resources It is fairly straightforward to convert a document from Sweave LaTeX to knitr LaTeX. Yihui Xie on...

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NBA Playoffs Update 5 (5-4)

June 9, 2012
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NBA Playoffs Update 5 (5-4)

This is the sixth post in my series on predicting the NBA playoffs with an algorithm. After the Boston loss in their last game, the algorithm is now 5-4 in the playoffs. Hopefully it is correct tonight! Open Sourcing the CodeI have had a couple of re...

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Visualizing Euro 2012 with ggplot2

June 9, 2012
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Visualizing Euro 2012 with ggplot2

After scanning this paper by Zeileis, Leitner & Hornik, I thought it would be interesting to see how the victory odds for each team changes as Euro 2012 progresses. To do this, I am going to collect the daily inverse odds of a tournament victory offered by a popular betting site for each team. Here

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knitr Performance Report 4

June 8, 2012
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knitr Performance Report 4

please see knitR Performance Report 3 (really with knitr) and dprint, knitr Performance Report–Attempt 3, knitr Performance Report-Attempt 2 and knitr Performance Report-Attempt 1 Here is another iteration of the ongoing performance reporting attempt...

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OpenCPU at useR 2012

June 8, 2012
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OpenCPU will be presented at useR 2012 in Nashville! Have a look at the abstract and the conference program. In the presentation we will introduce 3 inter-related projects which build on R: OpenCPU An open source framework for web development with R. Ohmage An open source system for large scale participatory sensing using mobile phones. ...

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Evaluation of Tactical Approaches

June 8, 2012
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Evaluation of Tactical Approaches

Tactical approaches are often chosen based on the best cumulative return which implicitly incorporates significant hindsight bias.  Just because an approach dominates for a period of time does not indicate that it will be the best approach.  ...

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R starter resources

June 8, 2012
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R starter resources

I’m hardly the first person you would want to talk to about learning statistics in R. But if you’re bent on teaching yourself R, and you’ve ended up at my blog, here are some resources I found useful. (No opinions here about whether R is good/bad better/worse than Excel, Minitab, Matlab, Octave, SPSS, Stata, SAS,

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Data Mining with R

June 8, 2012
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Earlier this week, Revolution Analytics' Joe Rickert gave a webinar Introduction to R for Data Mining. You can watch the replay below: If you're already familiar with R and the basics of data mining, you might want to skip ahead to the 13-minute mark where Joe's live demo begins. There you'll see practical examples of using R for decision...

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The world’s top seven airlines in the style of…

June 8, 2012
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The world’s top seven airlines in the style of…

The world’s top seven airlines in the style of NASA’s earth at night. (via Mapping the World’s Biggest Airlines | Spatial Analysis)

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Reproducible Research Using Sweave and LaTeX

June 8, 2012
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Reproducible Research Using Sweave and LaTeX

Here are the slides given during the Montreal R User Group workshop on April 30, 2012. RR-MtlRUsers.beamer

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RSMC 2011 Typhoon Tracks

June 8, 2012
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RSMC 2011 Typhoon Tracks

While at Puerto Princesa Airport in Palawan and waiting for my flight back to Manila, I opened my laptop and started doing what I usually do (practice may skills in R) on my idle time. With some inspirations from spatialanalysis.co.uk, I tried to make ...

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R, the master troll of statistical languages

June 8, 2012
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R, the master troll of statistical languages

Warning: what follows is a somewhat technical discussion of my love-hate relationship with the R statistical language, in which I somehow manage to waste 2,400 words talking about a single line of code. Reader discretion is advised. I’ve been using R to do most of my statistical analysis for about 7 or 8 years now–ever

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Universal portfolio, part 4

June 7, 2012
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Universal portfolio, part 4

The graph for figure 8.4 requires to be somehow careful about correctly lagging the CRP value when calculating the weights.# fig 8.4 of Cover "Universal Portfolios"require(logopt)x <- nyse.cover.1962.1984xik <- xnDays <- d...

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\STATE [algorithmic package]

June 7, 2012
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\STATE [algorithmic package]

I fought with my LαTεX compiler this morning as it did not want to deal with my code: looking on forums for incompatibilities between beamer and algorithmic, and adding all kinds of packages, to no avail. Until I realised one \STATE was missing: (This is connected with my AMSI public lecture on simulation, obviously!) Filed

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First R meeting in Bordeaux, France

June 7, 2012
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The program of the first R meeting that will be held in Bordeaux (France), the 2nd and 3rd of July, is now available at http://r2012.bordeaux.inria.fr/programme.html. It includes special sessions about mixed models, visualization, classification, data ...

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NBA Playoff Predictions Update 4 (5-3)

June 7, 2012
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NBA Playoff Predictions Update 4 (5-3)

This is update 4 to my original post about predicting the NBA playoffs with R. With the Thunder beating the Spurs and the Heat losing to the Celtics, the algorithm went 1-1 on predictions, making it 5-3 so far.Making some improvements I have been posting for some time about incorporating more data into the models, and I...

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June 29: The Royal Statistical Society talks R

June 7, 2012
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On June 29, the Royal Statistical Society will host six hours of presentations about R, under the banner "To R, or not to R, that is the question". Speakers include R Core member Prof Uwe Ligges, Dr Wayne Jones (from Shell UK), and Dr Peter Nash (from Imperial College London), among others. The event takes place June 29 at...

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Earthquake Density in the Philippines (2011-2012)

June 7, 2012
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Earthquake Density in the Philippines (2011-2012)

 Using the same data and package from my previous post, but minor tweak on the code, I produced the map below:

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Choosing colour palettes. Part II: Educated Choices.

June 7, 2012
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Choosing colour palettes. Part II: Educated Choices.

There are many resources on the use of colours in R, several packages, and a number of schemes already implemented in ggplot2. In the previous part, we saw how ggplot2 selects a default colour palette according to the type of variable, discrete or cont...

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Bill Veanables Workshop (Augsburg University, Germany :: 2-3 July 2012)

June 7, 2012
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Bill Venables talks R :: Augsburg University, Germany :: 2-3 July 2012 Bill Venables will give a two-day R Workshop in Augsburg on the 2nd and 3rd July 2012, an expanded version of the course, which he has been invited to give at this year’s useR! meeting in Nashville. Details: www.math.uni-augsburg.de/termin/R-workshop.html Organised by the Department of Computer-Oriented Statistics and Data...

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Mapping the World’s Biggest Airlines

June 7, 2012
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Mapping the World’s Biggest Airlines

The map above shows the routes flown by the top 7 airli

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Simulation in the profiling model

June 7, 2012
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Simulation in the profiling model

In this post I try to make a small simulation of the sensory (flavour) profiling data, and examine if the parameters of simulated data can be retrieved by the Bayesian model build in the previous posts.The conclusion is that it is difficult, the amount...

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You should not use split in production code

June 7, 2012
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Recently I have stumbled on a problem with split function applied on list of factors. The issue is that it might produce wrong splits when splitting factors contain dots.Here is the example of the problem. Invoking the following code:df <-...

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R functions to filter rjags results

June 7, 2012
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R functions to filter rjags results

A while back I was running a bunch of JAGS models through R, using the rjags (written by Martyn Plummer) and R2jags (by Yu-Sung Su) packages. These packages provide a great interface to the JAGS software, which allows analysis of … Continue reading →

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PLoS topic page on ABC

June 6, 2012
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PLoS topic page on ABC

A few more comments on the specific entry on ABC written by Mikael Sunnåker et al…. The entry starts with the representation of the posterior probability of an hypothesis, rather than with the posterior density of a model parameter, which seems to lead the novice reader astray. After all, (a) ABC was not introduced for

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Load Packages Automatically in RStudio

June 6, 2012
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Load Packages Automatically in RStudio

I recently finished a long stretch of work on a particular project that required me to draw upon four R packages.  Each time I got back to my work on the project, I’d have to load the packages manually, as … Continue reading →

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Poverty Incidence in the Philippines

June 6, 2012
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Poverty Incidence in the Philippines

Every three (3) years, the National Statistical Coordination Board (NSCB) publish data on provincial poverty incidence in the Philippines. Using R, I put the tabulated poverty incidence data into maps to check pattern and changes on the country's pr...

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Improving Monitor statistics with the "UECLs"

June 6, 2012
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Improving Monitor statistics with the "UECLs"

New Monitor Video:Improving Monitor statistics with the "UECLs"

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Simulating the Birthday Problem with data derived probabilities

June 6, 2012
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Simulating the Birthday Problem with data derived probabilities

You've probably heard of the Birthday Paradox: it only takes a small gathering of people before it's quite likely that two of them share the same birthday. You can solve the problem analytically or with simulation, but usually in either case simplifying assumptions are made (no-one born on February 29, for example). Joe Rickert uses Revolution R Enterprise 6...

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