Monthly Archives: June 2014

Specifying complicated groups of time series in hts

June 14, 2014
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With the latest version of the hts package for R, it is now possible to specify rather complicated grouping structures relatively easily. All aggregation structures can be represented as hierarchies or as cross-products of hierarchies. For example, a hierarchical time series may be based on geography: country, state, region, store. Often there is also a separate product hierarchy: product...

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Creating Inset Map with ggplot2

June 14, 2014
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Creating Inset Map with ggplot2

According to wiki.GIS.com one of the reason for using inset map is to provide a reference for an area for unfamiliar readers.  Inset map is also considered a great asset for cartographers.  Most of the GIS software available in the market hav...

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R and Vertica

June 14, 2014
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R and Vertica

I’ve been spending the last few months working my way through the integration of R and Vertica, and will try to keep here things that I find handy. I’m quite sad to see there is not much about this Vertica feature on the web, that’s a little disappointing. But, it didn’t stop us from creating a

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Announcing ESGtoolkit v0.1

June 14, 2014
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Announcing ESGtoolkit v0.1

I’m pleased to announce the release on CRAN repositories, of our new R package : ESGtoolkit. It’s a set of tools for Monte Carlo simulation of various models, involved in the construction of an Economic Scenario Generator (ESG),  such as : equilibrium and no-arbitrage short … Continue reading →

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RGolf: NGSL Scrabble

June 14, 2014
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RGolf: NGSL Scrabble

It is last part of RGolf before summer. As R excels in visualization capabilities today the task will be to generate a plot.We will work with NGSL data - a list of 2801 important vocabulary words for students of English as a second ...

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European talks. June-July 2014

June 14, 2014
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For the next month I am travelling in Europe and will be giving the following talks. 17 June. Challenges in forecasting peak electricity demand. Energy Forum, Sierre, Valais/Wallis, Switzerland. 20 June. Common functional principal component models for mortality forecasting. International Workshop on Functional and Operatorial Statistics. Stresa, Italy. 24–25 June. Functional time series with applications in demography. Humboldt University,...

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Identifying Pathways in the Consumer Decision Journey: Nonnegative Matrix Factorization

June 13, 2014
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Identifying Pathways in the Consumer Decision Journey: Nonnegative Matrix Factorization

The Internet has freed us from the shackles of the yellow page directory, the trip to the nearby store to learn what is available, and the forced choice among a limited set of alternatives. The consumer is in control of their purchase journey and can t...

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Hollywood loves orange and blue

June 13, 2014
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Hollywood loves orange and blue

Ever since the days of digital film processing, cinematographers have had free rein to recolor their shots in any way they like, without the hassle of chemical developing systems from the old film days. The Coen Brothers' Oh Brother Where Art Thou was the first Hollywood film to use this process, giving the film a washed-out yellow hue reminiscent...

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An Annotated Online Bioinformatics / Computational Biology Curriculum

June 13, 2014
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Two years ago David Searls published an article in PLoS Comp Bio describing a series of online courses in bioinformatics. Yesterday, the same author published an updated version, "A New Online Computational Biology Curriculum," (PLoS Comput Biol 10(6):...

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Introducing pkgKitten: Creating R Packages that purr

June 13, 2014
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A new package pkgKitten is now on CRAN in its infant version 0.1.0. It does only one thing: create R packages that do not suck. Or at least not as much as those created by the (R default) function package.skeleton() which creates files which the v...

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