Obstacles to performance in parallel programming

August 18, 2017
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Making your code run faster is often the primary goal when using parallel programming techniques in R, but sometimes the effort of converting your code to use a parallel framework leads only to disappointment, at least initially. Norman Matloff, author of Parallel Computing for Data Science: With Examples in R, C++ and CUDA, has shared chapter 2 of that...

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Starting a Rmarkdown Blog with Bookdown + Hugo + Github

August 18, 2017
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Starting a Rmarkdown Blog with Bookdown + Hugo + Github

Finally, -after 24h of failed attempts-, I could get my favourite Hugo theme up and running with R Studio and Blogdown. All the steps I followed are detailed in...

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ggvis Exercises (Part-2)

August 18, 2017
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ggvis Exercises (Part-2)

INTRODUCTION The ggvis package is used to make interactive data visualizations. The fact that it combines shiny’s reactive programming model and dplyr’s grammar of data transformation make it a...

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GoTr – R wrapper for An API of Ice And Fire

August 18, 2017
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GoTr – R wrapper for An API of Ice And Fire

Ava Yang It’s Game of Thrones time again as the battle for Westeros is heating up. There are tons of ideas, ingredients and interesting analyses out there and I was...

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Oil leakage… those old BMW’s are bad :-)

August 18, 2017
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Oil leakage…  those old BMW’s are bad :-)

Introduction My first car was a 13 year Mitsubishi Colt, I paid 3000 Dutch Guilders for it. I can still remember a friend that would not like me to...

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RcppArmadillo 0.7.960.1.0

August 17, 2017
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RcppArmadillo 0.7.960.1.0

The bi-monthly RcppArmadillo release is out with a new version 0.7.960.1.0 which is now on CRAN, and will get to Debian in due course. And it is a big...

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2017 App Update

August 17, 2017
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As you may have noticed, we have made a few changes to our apps for the 2017 season to bring you a smoother and quicker experience while also adding...

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Chapman University DataFest Highlights

August 17, 2017
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Chapman University DataFest Highlights

Editor’s Note: The 2017 Chapman University DataFest was held during the weekend of April 21-23. The 2018 DataFest will be held during the weekend of April 27-29. DataFest was founded...

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I made a 3D movie with ggplot2 once – here’s how I did it

August 17, 2017
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I made a 3D movie with ggplot2 once – here’s how I did it

Some time ago (last year actually 😳) I had a blast developing a feature for ggforce which had been on my mind for far to long than its limited utility...

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RStudio Server Pro is ready for BigQuery on the Google Cloud Platform

August 17, 2017
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RStudio Server Pro is ready for BigQuery on the Google Cloud Platform

RStudio is excited to announce the availability of RStudio Server Pro on the Google Cloud Platform. RStudio Server Pro GCP is identical...

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20 years of the R Core Group

August 17, 2017
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The first "official" version of R, version 1.0.0, was released on February 29, 200. But the R Project had already been underway for several years before then. Sharing this...

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Probability functions beginner

August 17, 2017
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Probability functions beginner

On this set of exercises, we are going to explore some of the probability functions in R with practical applications. Basic probability knowledge is required. Note: We are going...

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Tesseract and Magick: High Quality OCR in R

August 17, 2017
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Tesseract and Magick: High Quality OCR in R

Last week we released an update of the tesseract package to CRAN. This package provides R bindings to Google's OCR library Tesseract. install.packages("tesseract") The new version ships with the latest libtesseract...

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Update on Our ‘revisit’ Package

August 16, 2017
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Update on Our ‘revisit’ Package

On May 31, I made a post here about our R package revisit, which is designed to help remedy the reproducibility crisis in science. The intended user audience includes...

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Visualising Water Consumption using a Geographic Bubble Chart

August 16, 2017
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A geographic bubble chart is a straightforward method to visualise quantitative information with a geospatial relationship. Last week I was in Vietnam helping the Phú Thọ Water Supply Joint...

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Use the LENGTH statement to pre-set the lengths of character variables in SAS – with a comparison to R

Use the LENGTH statement to pre-set the lengths of character variables in SAS – with a comparison to R

I often create character variables (i.e. variables with strings of text as their values) in SAS, and they sometimes don’t render as expected.  Here is an example involving the...

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How to build an image recognizer in R using just a few images

August 16, 2017
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How to build an image recognizer in R using just a few images

Microsoft Cognitive Services provides several APIs for image recognition, but if you want to build your own recognizer (or create one that works offline), you can use the new...

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Thank You For The Very Nice Comment

August 16, 2017
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Thank You For The Very Nice Comment

Somebody nice reached out and gave us this wonderful feedback on our new Supervised Learning in R: Regression (paid) video course. Thanks for a wonderful course on DataCamp on...

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Data wrangling : Cleansing – Regular expressions (1/3)

August 16, 2017
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Data wrangling : Cleansing – Regular expressions (1/3)

Data wrangling, is the process of importing, cleaning and transforming raw data into actionable information for analysis. It is a time-consuming process which is estimated to take about 60-80%...

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Understanding overfitting: an inaccurate meme in supervised learning

August 16, 2017
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Understanding overfitting: an inaccurate meme in supervised learning

Preamble There is a lot of confusion among practitioners regarding the concept of overfitting. It seems like, a kind of an urban legend or a meme, a folklore is circulating in data...

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MODIStsp 1.3.3 is out – Speeding things up and squashing some bugs !

August 16, 2017
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MODIStsp 1.3.3 is out – Speeding things up and squashing some bugs !

  A new version of MODIStsp (1.3.3) is on CRAN as of today ! Below, you can find a short description of the main improvements.Processing speed improvements   Processing of...

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Visualizations with R and Databases

August 15, 2017
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Visualizations with R and Databases

The Challenge Visualizations are one of R’s strengths. There are many functions and packages that create complex plots, often with one simple command. These plotting functions do two things: first,...

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Master the tidyverse

August 15, 2017
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If you’ve read the book “R for Data Science” or plan to, now you can dive deeper with co-author and RStudio Master Instructor Garrett Grolemund, winner of the Excellence...

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RStudio 1.1 Preview – Data Connections

August 15, 2017
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RStudio 1.1 Preview – Data Connections

Today, we’re continuing our blog series on new features in RStudio 1.1. If you’d like to try these features out for yourself, you can download a preview release of...

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When A Fire Starts to Burn – Fiery 1.0 released

August 15, 2017
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When A Fire Starts to Burn – Fiery 1.0 released

I’m pleased to announce that fiery has been updated to version 1.0 and is now available on CRAN. As the version bump suggests, this is a rather major update to...

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Buzzfeed trains an AI to find spy planes

August 15, 2017
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Buzzfeed trains an AI to find spy planes

Last year, Buzzfeed broke the story that US law enforcement agencies were using small aircraft to observe points of interest in US cities, thanks to analysis of public flight-records...

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Working with air quality and meteorological data Exercises (Part-1)

August 15, 2017
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Working with air quality and meteorological data Exercises (Part-1)

Atmospheric air pollution is one of the most important environmental concerns in many countries around the world, and it is strongly affected by meteorological conditions. Accordingly, in this set...

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Simple practice: basic maps with the Tidyverse

August 15, 2017
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Simple practice: basic maps with the Tidyverse

To master data science, you need to practice. This sounds easy enough, but in reality, many people have no idea how to practice. Ultimately, you need to .... The post Simple practice:...

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Magick 1.0: 🎩 ✨🐇 Advanced Graphics and Image Processing in R

August 15, 2017
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Magick 1.0: 🎩 ✨🐇 Advanced Graphics and Image Processing in R

Last week, version 1.0 of the magick package appeared on CRAN: an ambitious effort to modernize and simplify high quality image processing in R. This R package builds upon...

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