3072 search results for "MAP"

Making Better DNS TXT Record Lookups With Rcpp

April 25, 2014
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Technically this is Part 2 of Firewall-busting ASN-lookups. However, I said (in Part 1) that Part 2 would be about making a vectorized version and this is absolutely not about that. Rather than fib, I merely misdirect. Moving on… As you can see in Part 1, we have to resort to a system() call to do the TXT record lookup...

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Preventing escaping in HTML

April 24, 2014
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Preventing escaping in HTML Preventing escaping in HTML library(xtable) ## ## Attaching package: 'xtable'## ## The following objects are masked from 'package:Hmisc':## ## label, label<- library(stringr)library(whisker) Problem statementBeing a novice in R language, the problem I faced maight be a novice one,...

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Firewall-busting ASN-lookups – Part 1

April 23, 2014
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This is a short post on one way to bust through your corporate firewall when trying to use the Team CYMRU ASN lookup facility that we presented in our book. Part 2 will show how to create a vectorized version of this code. Most corporate networks aren’t going to allow port 43 (WHOIS) access directly, which will make...

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R activity around the world

April 22, 2014
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R activity around the world

This project was inspired by "Where is the R Activity?" and our follow-up post on the number of useR! 2013 attendees. But instead of static maps, now we gathered bunch of R-related data from a variety of different sources to create some interactive car...

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Overlaying species occurrence data with climate data

April 22, 2014
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Overlaying species occurrence data with climate data

One of the goals of the rOpenSci is to facilitate interoperability between different data sources around web with our tools. We can achieve this by providing functionality within our packages that converts data coming down via web api's in one format (often a provider specific schema) into a standard format. The new version of rWBclimate that...

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Notes from the Tokyo R User Group meeting, 17 April 2014

April 21, 2014
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Notes from the Tokyo R User Group meeting, 17 April 2014

Last Thursday I had the pleasure to attend the Tokyo R user group meeting. And what a fun meeting it was! Over 40 R users had come together in central Tokyo. Yohei Sato, who organises the meetings, allowed me to talk a little about the recent developme...

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Mythbusting – Dr. Copper

April 21, 2014
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Mythbusting – Dr. Copper

Image by Justin Reznick   “An economist is an expert who will know tomorrow why the things he predicted yesterday didn't happen today.” Laurence J. Peter (author and creator of the Peter Principle) If you were paying attention to financial sites last month, you probably noticed a number of articles on “Dr. Copper”. Here is

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RStata: Funny or just annoying?

April 21, 2014
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RStata: Funny or just annoying?

Okay okay.  The joke is up.  Besides likely necessitating an emergency call to from the Stata Management Team to the Stata Legal Team, my post on April 1st of 2014 entitled "RStata: Stata Fully Mapped into R", was intended as a practical joke...

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Fracking and House Prices on the Marcellus Shale

April 21, 2014
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Fracking and House Prices on the Marcellus Shale

Starting last summer I worked on a short project that set out to estimate the potential costs of externalities due to unconventional shale gas production in the Marcellus shale on local house prices using a dataset of roughly 150,000 recently sold houses in Ohio, West Virginia and Pennsylvania. I stopped working on a project that

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The Circus Tent Problem with R’s Quadprog

April 20, 2014
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The Circus Tent Problem with R’s Quadprog

The MathWorks has an interesting demo on how the shape of a circus tent can be modeled as the solution of a quadratic program in MATLAB. In this post, we'll show how to solve this same problem in R using the quadprog package and also provide the technical details not covered in the Mathwork's example. In...

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