A new version of rfoaas is now on CRAN. The rfoaas package provides an interface for R to the most excellent FOAAS service--which provides a modern, scalable and RESTful web service for the frequent need to tell someone to eff off. This version align... [Read more...]

A guest article by Asher Raz, PhD, CareerHarmony Sometimes, data of subjects are recorded on a server (e.g. SQL server) as string data records for each subject. In some cases [Read more...]

I’ve posted a new release of the ggRandomForests: Visually Exploring Random Forests to CRAN at (http://cran.r-project.org/package=ggRandomForests) The biggest news is the inclusion of some holiday reading – a ggRandomForests package vignette! ggRandomForests: Visually Exploring a Random Forest for Regression The vignette… Continue reading → [Read more...]

Conrad produced another minor release 4.600 of Armadillo. As before, I had created a GitHub-only pre-release(s) of his pre-release(s), and tested a pre-release as well as the actual release against the now over one hundred CRAN dependents of our RcppArmadillo package. The tests passed fine as usual with less ... [Read more...]

I saw the post a time series contest on Rob J Hyndman's blog. Since I am still wanting to play around with some bigger data sets, so I went to the source website https://drive.google.com/folderview?id=0BxmzB6Xm7Ga1MGxsdlMxbGllZnM&usp=shar... [Read more...]

There are a few exciting announcements I would love to share with R community. We feel very honored to host meetup and class offered by Kaggle #1 ranked Data Scientist, Owen Zhang and book author of Applied predictive modeling, Max Kuhn. Featured R experts meetup Featured talk given by Kaggle world ... [Read more...]

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I’ve put together an updated version of my partools package, including Snowdoop, an alternative to MapReduce algorithms.  You can download it here, version 1.0.1. To review:  The idea of Snowdoop is to create your own file chunking, rather than having something like Hadoop do it for you, and then using ... [Read more...]

This is an example from Zucchini & MacDonald’s book on Hidden Markov Models for Time Series (exercise 1.3). The data is annual counts of earthquakes of magnitude 7 or greater, which exhibits both overdispersion for a Poisson (where the mean should equal the variance) as well as serial dependence. The aim is ... [Read more...]

Introduction The purpose of this post is to show how to use Boost::Geometry library which was introduced recently in Rcpp. Especially, we focus on R-tree data structure for searching objects in space because only one spatial index is implemented - R-tree Currently in this library. Boost.Geometry which is ... [Read more...]

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This post is different from all others you’ve seen so far on this site. This is actually not a proper post, but a respond to a comment from my previous post Recommender Systems 101 – a... [Read more...]

A new version of rfoaas was prepared for CRAN, but refused on the grounds of having been updated within 24 hours. Oh well. To recap, the rfoaas package provides an interface for R to the most excellent FOAAS service -- which provides a modern, scalable and RESTful web service for the ... [Read more...]

Ever wonder what's the mathematics behind face recognition on most gadgets like digital camera and smartphones? Well for most part it has something to do with statistics. One statistical tool that is capable of doing such feature is the Principal Component Analysis (PCA). In this post, however, we will not ... [Read more...]

Ever wonder what's the mathematics behind face recognition on most gadgets like digital camera and smartphones? Well for most part it has something to do with statistics. One statistical tool that is capable of doing such feature is the Principal Component Analysis (PCA). In this post, however, we will not ... [Read more...]

A new version of rfoaas is now on CRAN. The rfoaas package provides an interface for R to the most excellent FOAAS service -- which provides a modern, scalable and RESTful web service for the frequent need to tell someone to eff off. This is minor up... [Read more...]

Time lapses are a fun way to quickly show a long period of time. They typically involve setting up your camera on a tripod and taking photos at a regular interval, like every 5 seconds. After all the photos have been taken, they are combined into a mov... [Read more...]

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I have uploaded a draft of Chapter 3 — Plotting Fundamentals — for the Introduction to Fisheries Analyses with R (IFAR) book (note the new name).  This chapter is meant to be a quick introduction to plotting in base R for plots … Continue reading → [Read more...]

Last month, the Philae lander touched down on comet Churyumov–Gerasimenko. In the process, the lander and the orbiting Rosetta probe captured detailed data on the geometry of the comet, which the ESA published as a shape file. You can use the rgl package to visualize and explore such shape ... [Read more...]