2615 search results for "GIS"

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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Announcing Revolution R Enterprise 6.0

June 5, 2012
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Revolution Analytics is proud to announce the latest update to our enhanced, production-grade distribution of R, Revolution R Enterprise. This update expands the range of supported computation platforms, adds new Big Data predictive models, and updates to the latest stable release of open source R (2.14.2), which improves performance of the R interpreter by about 30%. This release expands...

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UK house prices visualised with googleVis-0.2.16

June 5, 2012
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UK house prices visualised with googleVis-0.2.16

A new version of googleVis has been released on CRAN and the project site. Version 0.2.16 adds the functionality to plot quarterly and monthly data as a motion chart. To illustrate the new feature I looked for a quarterly data set and stumbled across t...

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Download and parse EDHEC hedge fund indexes

June 4, 2012
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Download and parse EDHEC hedge fund indexes

In our pre-conference workshop, Brian Peterson and I worked with the EDHEC hedge fund indexes as a way to demonstrate how to use PortfolioAnalytics within the context of long-term allocation problems. Although they are not investible, these indexes are probably more representative than most given that they are, in fact, meta-indexes. Other indexes might be

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Extracting an image chunk from a collection of Large MrSid Images

June 4, 2012
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Recently needed to extract a small "chunk" from a collection of adjacent MrSid mosaics, each about 4Gb in size. Once again, GDAL came to the rescue, and saved much time and agony wile working with very large, compressed, and proprietary-format files. T...

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Obtaining a protein-protein interaction network for a gene list in R

June 3, 2012
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Obtaining a protein-protein interaction network for a gene list in R

Building a network of interaction between a bunch of genes can help a great deal in understanding the relationships between the seemingly disparate elements from your list. It can seems challenging at first to build such network but it's less complicat...

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Universal portfolio, part 3

June 3, 2012
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Universal portfolio, part 3

After the theoretical analysis, section 8 of Universal Portfolios provides examples.  We now use logopt and R to reproduce them, the first three in this post.The examples of Universal Portfolios use a long time series...

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Making interactive slides with Org mode and googleVis in R

June 3, 2012
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Making interactive slides with Org mode and googleVis in R

There’s been a lot of justifiable excitement in the R community about Yihui Xie’s great work, and most recently the incorporation of his knitr package into the RStudio software. Knitr is seen, justifiably, as a worthy successor to SWeave for … Continue reading →

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Coding a dynamic systems and controlling it via a graphical user interface

June 3, 2012
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Coding a dynamic systems and controlling it via a graphical user interface

My work, in the past year, has consisted mostly of coding dynamic models in R, models which I will soon be exporting to a server-based R implementation, possibly thanks to rApache.I ususally run my models through an input file where I specify all param...

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R script to manipulate health data

June 3, 2012
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Here is the code that fixed up the World Bank data export for use in Tableau. The databank spits out everything in an untidy format for grouping and aggregating. The reshape2 and plyr packages  make it easy to manipulate the whole set … Continue reading →

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