3860 search results for "gis"

New and Updated R Packages for Security Data Science

August 12, 2014
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We’ve got some new and updated R packages that are (hopefully) helpful to security folks who are endeavouring to use R in their quest to find and prevent malicious activity. All packages now incorporate a testthat workflow and are fully roxygen-ized and present some best practices in R package development (a post on that very topic is pending). We’ll start with...

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Critical Data (free) Hackathon in London (Sept 6-7, 2014)

August 11, 2014
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We would like to invite you to participate in our forthcoming Critical Data Marathon a FREE event taking place in London on 6-7 September 2014. The event is collaboratively organised between researchers at Massachusetts Institute of Technology (MIT), University College London, King’s College London, and Imperial College London.The data marathon will bring together frontline healthcare providers (nurses, pharmacists, doctors) with data scientists to...

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Master R Developer Workshop – San Francisco, January 19-20

August 11, 2014
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Master R Developer Workshop – San Francisco, January 19-20

RStudio is planning a new Master R Developer Workshop to be taught by Hadley Wickham in the San Francisco Bay Area on January 19-20. This will be the same workshop that Hadley is teaching in September in New York City to a sold out audience. If you did not get a chance to register for the

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Opening Up Access to Data: Why APIs May Not Be Enough…

August 11, 2014
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Opening Up Access to Data: Why APIs May Not Be Enough…

Last week, a post on the ONS (Office of National Statistics) Digital Publishing blog caught my eye: Introducing the New Improved ONS API which apparently “mak things much easier to work with”. Ooh… exciting…. maybe I can use this to start hacking together some notebooks?:-) It was followed a few days later by this one

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Minimal reproducible examples

August 10, 2014
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I occasionally get emails from people thinking they have found a bug in one of my R packages, and I usually have to reply asking them to provide a minimal reproducible example (MRE). This post is to provide instructions on how to create a MRE. Bug reports on github, not email First, if you think there is a bug,...

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Vtreat: designing a package for variable treatment

August 7, 2014
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Vtreat: designing a package for variable treatment

When you apply machine learning algorithms on a regular basis, on a wide variety of data sets, you find that certain data issues come up again and again: Missing values (NA or blanks) Problematic numerical values (Inf, NaN, sentinel values like 999999999 or -1) Valid categorical levels that don’t appear in the training data (especially Related posts:

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Making Maps with a Punchline

August 6, 2014
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Making Maps with a Punchline

I’ve had a lifelong fascination with maps, and working with R definitely enables my map...

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A New Use for Pipes in R: Forkbombs

August 6, 2014
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Almost 3 years ago, I wrote about how to forkbomb with R. A quick recap is that a forkbomb is a low-tier, malicious misuse of a system; sort of a "baby's first denial of service". The idea is that you write a program that will start an entirely new copy of itself each time it is executed. Executing it...

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ESA 2014: Don’t Know Much About History…

August 5, 2014
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ESA 2014: Don’t Know Much About History…

After my last post text-mining ESA Annual Meeting abstracts, Nash Turley was interested in the presence of the term “natural history” in ESA abstracts. I decided to collect a little more data by including programs back to 2010, giving a five-year data set. Thankfully the program back to 2010 remains in mostly the...

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Basic Forward and Reverse DNS Lookups In R (with Rcpp)

August 4, 2014
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Back in April, we showed you how to use a C resolver library to make many different kinds of DNS lookups. More oft than not, such complete functionality is not necessary, but R still only provides nsl to get an IPv4 address of a given hostname, which is woefully inadequate. I needed to write an R implementation...

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