May 2016

OpenCPU release 1.6

May 19, 2016 | Jeroen Ooms

Following a few weeks of testing, OpenCPU 1.6 has been released. OpenCPU is a production-ready system for embedded statistical computing with R. It provides a neat API for remotely calling R functions over HTTP via e.g. JSON or Protocol Buffers. The OpenCPU server implementation is stable and has been thorougly ...
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ABC random forests for Bayesian parameter inference

May 19, 2016 | xi'an

Before leaving Helsinki, we arXived [from the Air France lounge!] the paper Jean-Michel presented on Monday at ABCruise in Helsinki. This paper summarises the experiments Louis conducted over the past months to assess the great performances of a random forest regression approach to ABC parameter inference. Thus validating in this ...
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User Groups and R Awareness

May 19, 2016 | Joseph Rickert

by Joseph Rickert For quite a few years now we have attempted to maintain the Revolution Analytics' Local R User Group Directory as the complete and authoritative list of R user groups. Meetup groups make this list in one of two ways: we discover the group because they have a ... [Read more...]

RTutor: Free Trade Agreements

May 19, 2016 | Economics and R - R posts

There is quite some sceptisim towards TTIP, the currently negotiated free trade agreement between Europe and the USA. Even in an exporting nation like Germany, there are substantial worries about reduction in consumer protection standards, or fear of limits to democracy if cooperations can sue states in international settlement courts. ... [Read more...]

IP string to integer conversion with Rcpp

May 19, 2016 | Christoph Safferling

IP address conversion At work I recently had to match data on IP addresses and some fuzzy timestamp matching – a mess, to say the least. But before I could even tackle that problem, one dataset had the IPs stored as a character (e.g. 10.0.0.0), while the other dataset had the ... [Read more...]

Push it to the limit: SOM + Clustering + Networks

May 18, 2016 | dgrapov

What is the highest dimensional visualization you can think of? Now imagine it being interactive. The following details a Frankenstein visualization packing a smorgasbord of multivariate goodness. Enter first, self-organizing maps (SOM). I first fell into a love dream with SOMs after using the kohonen package. The  wines data set ...
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Using MCMC output to efficiently estimate Bayes factors

May 18, 2016 | xi'an

As I was checking for software to answer a query on X validated about generic Bayes factor derivation, I came across an R software called BayesFactor, which only applies in regression settings and relies on the Savage-Dickey representation of the Bayes factor when the null hypothesis writes as θ=θ⁰ (and possibly ...
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Spark 2.0: more performance, more statistical models

May 18, 2016 | David Smith

Apache Spark, the open-source cluster computing framework, will soon see a major update with the upcoming release of Spark 2.0. This update promises to be faster than Spark 1.6, thanks to a run-time compiler that generates optimized bytecode. It also promises to be easier for developers to use, with streamlined APIs and ... [Read more...]

Embedding image example

May 18, 2016 | Bernie Kim

This is an example of embedding an image. All images are sourced from a S3 bucket. [crayon-58322b82cb0a7969573396/] [crayon-58322b82cb0ae864427796/] You can also embed plots, for example: Note that the echo = FALSE parameter was added to Read More ... [Read more...]

Using a new Mapbox Studio map in an R Leaflet project

May 17, 2016 | Kyle Walker

Mapbox recently announced that map styles designed in the new Mapbox Studio are now available as basemaps in other platforms, such as Tableau, CartoDB, and ArcGIS Online: https://www.mapbox.com/blog/use-studio-styles-in-gis-tools/. Previously, this wasn’t possible due to these tools’ incompatibility with the GL-based vector tiles produced by ... [Read more...]

Using a new Mapbox Studio map in an R Leaflet project

May 17, 2016 | Kyle Walker

Mapbox recently announced that map styles designed in the new Mapbox Studio are now available as basemaps in other platforms, such as Tableau, CartoDB, and ArcGIS Online: https://www.mapbox.com/blog/use-studio-styles-in-gis-tools/. Previously, this wasn’t possible due to these tools’ incompatibility with the GL-based vector tiles produced by ...
[Read more...]

New R package: lazyrmd

May 17, 2016 | ryan hafen

This post is about an R Markdown html document format that provides the ability to lazily load plot outputs in R Markdown-generated html. Since my last post I’ve had my nose to the grindstone on some work for a client and have been (quite enjoya... [Read more...]

Best packages for data manipulation in R

May 17, 2016 | Fisseha Berhane

There are 2 packages that make data manipulation in R fun. These are dplyr and data.table. Both packages have their strengths. While dplyr is more elegant and resembles natural language, data.table is succinct and we can do a lot with data.table in just a single line. Further, data.... [Read more...]

Playing With Julia (Set)

May 17, 2016 | aschinchon

Viento, me pongo en movimiento y hago crecer las olas del mar que tienes dentro (Tercer Movimiento: Lo de Dentro, Extremoduro) I really enjoy drawing complex numbers: it is a huge source of entertainment for me. In this experiment I play with the Julia Set, another beautiful fractal like this ... [Read more...]
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