RcppArmadillo 0.4.450.1.0

September 22, 2014
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Continuing with his standard pace of approximately one new version per month, Conrad released a new minor release of Armadillo a few days ago. As before, I had created a GitHub-only pre-release which was tested against all eighty-seven (!!) CRAN dependents of our RcppArmadillo package and then uploaded RcppArmadillo 0.4.450.0 to CRAN. The CRAN...

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Newcastle R course, a write-up

September 22, 2014
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I recently attended a week-long R course in Newcastle, taught by Colin Gillespie. It went from “An Introduction to R” to “Advanced Graphics” via a day each...

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Twitter’s REST API v1.1 with R (for Linux and Windows)

September 22, 2014
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Twitter’s REST API v1.1 with R (for Linux and Windows)

In this tutorial I am going to describe a straightforward way of how to make use of Twitter’s REST API v1.1. For that purpose I composed a little package (RTwitterAPI),...

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Around the world in 80k miles

September 22, 2014
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Around the world in 80k miles

You're probably familiar with the classic Travelling Salesman problem: given (say) 20 cities, what is shortest route you can take that passes through all 20 cities and returns to...

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H2O, Domino & Kaggle Quick-Start Guide and RUGSMAPS2

September 22, 2014
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H2O, Domino & Kaggle Quick-Start Guide and RUGSMAPS2

Following up on my previous posts about H2O Deep Learning (TTTAR1) and RUGSMAPS (TTTAR2), here is a quick update on two interesting...

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Dirk Eddelbuettel, the useR! 2014 Interview

September 22, 2014
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First things first, Dirk Eddelbuettel was recently named ordinary. This seems contradictory, since Dirk is a...

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What is Cluster Analysis? A Projective Test

September 22, 2014
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What is Cluster Analysis? A Projective Test

Supposedly, projective tests (e.g., the inkblots of psychoanalysis) contain sufficient ambiguity that "what you see" reveals some aspect of your thinking that has escaped your awareness. Although the following...

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How to reveal anyone’s interests on Twitter using social network analysis

September 22, 2014
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How to reveal anyone’s interests on Twitter using social network analysis

I’m giving a talk this Friday (September 26, from 6 – 8 PM) on my current research into interest detection on Twitter. The talk …Continue reading →

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Installing R/RStudio on Ubuntu 14.04

September 21, 2014
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My last experience with Linux was back in 2002/2003. At that time pretty much everything on Linux was done in the console. I remmember struggling for days with a simple...

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Ebola, Wikipedia and data janitors

September 21, 2014
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Ebola, Wikipedia and data janitors

Sometimes, several strands of thought come together in one place. For me right now, it’s the Wikipedia page “Ebola virus epidemic in West Africa”, which got me thinking about...

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HMM example with depmixS4

September 21, 2014
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HMM example with depmixS4

On a scale of one to straight up voodoo, Hidden Markov Models (HMMs) are definitely up there for me.They have all sorts of applications, and as the name suggests,...

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Build Predictive Model on Big data: Using R and MySQL Part-3

September 21, 2014
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Build Predictive Model on Big data: Using R and MySQL Part-3

Welcome to last part of the series post again! In previous part I discussed about the solutions to the questions mentioned in first part. In this part, we will...

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new kids on the block

September 21, 2014
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new kids on the block

This summer, for the first time, I took three Dauphine undergraduate students into research projects thinking they had had enough R training (with me!) and several stats classes to...

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Build Predictive Model on Big data: Using R and MySQL Part-2

September 21, 2014
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Build Predictive Model on Big data: Using R and MySQL Part-2

Welcome to the second part of the series blog posts. In first part we tried to understand the challenges of fitting predictive model to the large dataset. In this...

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Build Predictive Model on Big data: Using R and MySQL Part-1

September 21, 2014
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Build Predictive Model on Big data: Using R and MySQL Part-1

Wellcome to the series blog posts. Since long time, I am writing post on Machine learning with R. Today I am gonna discuss on big data problem while fitting...

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Effective risk management with R

September 21, 2014
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Effective risk management with R

Conference The first EARL Conference (Effective Applications of the R Language) was held 2014 September 15-17 in London. Talk My talk was “Effective risk management with R” (annotated slides)....

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Trying dplyr on triathon data

September 21, 2014
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Trying dplyr on triathon data

There was a triathlon in Almere last week, like every year since 1983. I pulled the data of all years to get some idea how things have changed in...

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FPP now available as a downloadable e-book

September 20, 2014
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FPP now available as a downloadable e-book

My forecasting textbook with George Athanasopoulos is already available online (for free), and in print via Amazon (for under $40). Now we have made it available as a downloadable e-book...

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Generate Random Inverse Gaussian in R

September 20, 2014
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Generate Random Inverse Gaussian in R

Needed to generate draws from an inverse Gaussian today, so I wrote the following Rcpp code: It seems to be faster than existing implementations such as rig from mgcv...

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Brazilian Presidential Election

September 20, 2014
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Brazilian Presidential Election

TweetFor those who follow this tale, the chart below shows the hitherto of vote intentions among the viable candidates as reported in various polls. Data collected over 2012 were...

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Charting/Mapping the Scottish Vote with R (an rvest/dplyr/tidyr/TopoJSON/ggplot tutorial)

September 20, 2014
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Charting/Mapping the Scottish Vote with R (an rvest/dplyr/tidyr/TopoJSON/ggplot tutorial)

The BBC did a pretty good job live tracking the Scotland secession vote, but I really didn’t like the color scheme they chose and decided to use the final...

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Nuts and Bolts of Quantstrat, Part III

September 20, 2014
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Nuts and Bolts of Quantstrat, Part III

This post will focus on signals in quantstrat. In comparison to indicators, signals in quantstrat are far more cut-and-dry, as … Continue reading →

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Using the Debug Option in readDICOMfile()

September 20, 2014
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Using the Debug Option in readDICOMfile()

Some recent activity in stackoverflow was brought to my attention.  Specifically, several questions were raised with reading files into R using readDICOMFile() in the oro.dicom package. The questions did...

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momentify R package

September 19, 2014
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momentify R package

I presented today an arxived paper of my postdoc at the big success Young Bayesian Conference in Vienna. The big picture of the talk is simple: there are situations in Bayesian nonparametrics...

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Yep. He made it; country voted No.

September 19, 2014
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Yep. He made it; country voted No.

Tweet Yesterday, more Scots than ever since universal suffrage was introduced cast a ballot on the matter of independence. The turnout was itself phenomenal and that implicating a series...

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Webinar September 25: Data Science with R

September 19, 2014
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A quick heads up that if you'd like to get a great introduction to doing data science with the R language, Joe Rickert will be giving a free webinar...

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What does CNN have in common with Carmen Reinhart, Kenneth Rogoff, and Richard Tol: They all made foolish, embarrassing errors that would never have happened had they been using R Markdown

September 19, 2014
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What does CNN have in common with Carmen Reinhart, Kenneth Rogoff, and Richard Tol:  They all made foolish, embarrassing errors that would never have happened had they been using R Markdown

Rachel Cunliffe shares this delight: Had the CNN team used an integrated statistical analysis and display system such as R Markdown, nobody would’ve needed to type in the numbers...

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The New Consumer Requires an Updated Market Segmentation

September 18, 2014
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The New Consumer Requires an Updated Market Segmentation

The new consumer is the old consumer with more options and fewer prohibitions. Douglas Holt calls it the postmodern market defined by differentiation: "consumer identities are being fragmented, proliferated, recombined, and...

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Pander tables inside of knitr

September 18, 2014
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Pander tables inside of knitr

Hadley Wickham opened my eyes that calling pander to generate nifty markdown tables inside of knitr requires a special chunk option, which bothersome extra step might be saved by updating pander...

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