Stan Weekly Roundup, 21 July 2017

July 21, 2017
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It was another productive week in Stan land. The big news is that Jonathan Auerbach reports that A team of Columbia students (mostly Andrew’s, including myself) recently won first place in a competition predicting elementary school enrollment. I heard 192 entered, and there were 5 finalists….Of course, we used Stan (RStan specifically). … Thought it The post Stan Weekly...

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IEEE Spectrum 2017 Top Programming Languages

July 21, 2017
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IEEE Spectrum 2017 Top Programming Languages

IEEE Spectrum has published its fourth annual ranking of of top programming languages, and the R language is again featured in the Top 10. This year R ranks at...

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How to create reports with R Markdown in RStudio

July 21, 2017
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How to create reports with R Markdown in RStudio

Introduction R Markdown is one of the most popular data science tools and is used to save and execute code to create exceptional reports whice are easily shareable. The...

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Power analysis and sample size calculation for Agriculture

July 21, 2017
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Power analysis and sample size calculation for Agriculture

Power analysis is extremely important in statistics since it allows us to calculate how many chances we have of obtaining realistic results. Sometimes researchers tend to underestimate this aspect...

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Chart golf: the “demographic tsunami”

July 20, 2017
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Chart golf: the “demographic tsunami”

“‘Demographic tsunami’ will keep Sydney, Melbourne property prices high” screams the headline. While the census showed Australia overall is aging, there’s been a noticeable lift in the number of...

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Surprising result when exploring Rcpp gallery

July 20, 2017
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Surprising result when exploring Rcpp gallery

I’m starting to incorporate more Rcpp in my R work, and so decided to spend some time exploring the Rcpp Gallery. One example by John Merrill caught my eye. He provides a...

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Package bigstatsr: Statistics with matrices on disk (useR 2017)

July 20, 2017
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Package bigstatsr: Statistics with matrices on disk (useR 2017)

In this post, I will talk about my package bigstatsr, which I’ve just presented in a lightning talk of 5 minutes at useR!2017. You can listen to me in...

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Visualizing Portfolio Volatility

July 20, 2017
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This is the third post in our series on portfolio volatility, variance and standard deviation. If you want to start at the beginning with calculating portfolio volatility, have a...

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How to make maps with Census data in R

July 20, 2017
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How to make maps with Census data in R

US Census Data The US Census collects a number of demographic measures and publishes aggregate data through its website. There are several ways to use Census data in R,...

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What analysis program do conservation scientists use?

July 20, 2017
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International Congress for Conservation Biology: What analysis program do conservation scientists use? With the International Congress for Conservation Biology starting 23rd July I was wondering, what analysis programs are most...

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Quirks about running Rcpp on Windows through RStudio

July 20, 2017
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Quirks about running Rcpp on Windows through RStudio

Quirks about running Rcpp on Windows through RStudio This is a quick note about some tribulations I had running Rcpp (v. 0.12.12) code through RStudio (v. 1.0.143) on a...

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Quickly Check your id Variables

July 20, 2017
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Virtually every dataset has them; id variables that link a record to a subject and/or time point. Often one column, or a combination of columns, forms the unique id...

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Data Analysis for Life Sciences

July 20, 2017
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Data Analysis for Life Sciences

Rafael Irizarry from the Harvard T.H. Chan School of Public Health has presented a number of courses on R and Biostatistics on EdX, and he recently also provided an...

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Preparing for the Plumber v0.4.0 Release

Plumber is a package which allows you to create web APIs from your R code. If you're new to Plumber, you can take a look at www.rplumber.io to learn...

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Preparing for the Plumber v0.4.0 Release

Plumber is a package which allows you to create web APIs from your R code. If you're new to Plumber, you can take a look at www.rplumber.io to learn...

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The Viral Recurring Decimal: Euler Problem 26

July 19, 2017
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Proposed solution to Euler Problem 26 in the R language. Find the value of d Continue reading → The post The Viral Recurring Decimal: Euler Problem 26 appeared first on...

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Ligature fonts for R

July 19, 2017
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Ligature fonts for R

Ligature fonts are fonts which sometimes map multiple characters to a single glyph, either for readability or just because it looks neat. Importantly, this only affects the rendering of...

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Neville’s Method of Polynomial Interpolation

July 19, 2017
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Part 1 of 5 in the series Numerical AnalysisNeville’s method evaluates a polynomial that passes through a given set of and points for a particular value using the Newton...

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ArCo Package v 0.2 is on

July 19, 2017
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ArCo Package v 0.2 is on

The ArCo package 0.2 is now available on CRAN. The functions are now more user friendly. The new features are: Default function for estimation if the user does not...

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Are Premium Airlines Also Premium in Performance? / A Shiny Application

July 19, 2017
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Are Premium Airlines Also Premium in Performance? / A Shiny Application

Have you ever found that, the flight for which you paid a premium fare did not live up to your expectations? Maybe you would like to The post Are...

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Data wrangling : Transforming (2/3)

July 19, 2017
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Data wrangling : Transforming (2/3)

Data wrangling is a task of great importance in data analysis. Data wrangling, is the process of importing, cleaning and transforming raw data into actionable information for analysis. It...

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New R Course: Writing Efficient R Code

July 19, 2017
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New R Course: Writing Efficient R Code

Hello R users, we've got a brand new course today: Writing Efficient R Code by Colin Gillespie. The beauty of R is that it is built for performing data analysis....

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Short course on Bayesian data analysis and Stan 23-25 Aug in NYC!

July 19, 2017
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Jonah “ShinyStan” Gabry, Mike “Riemannian NUTS” Betancourt, and I will be giving a three-day short course next month in New York, following the model of our successful courses in...

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Machine Learning Explained: supervised learning, unsupervised learning, and reinforcement learning

July 19, 2017
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Machine Learning Explained: supervised learning, unsupervised learning, and reinforcement learning

Machine learning is often split between three main types of learning: supervised learning, unsupervised learning, and reinforcement learning. Knowing the differences between these three types of learning is necessary for...

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RcppAPT 0.0.4

July 19, 2017
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A new version of RcppAPT -- our interface from R to the C++ library behind the awesome apt, apt-get, apt-cache, ... commands and their cache powering Debian, Ubuntu...

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seplyr update

July 19, 2017
By

The development version of my new R package seplyr is performing in practical applications with dplyr 0.7.* much better than even I (the seplyr package author) expected. I think...

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The oem package for penalized regression is on CRAN

July 18, 2017
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The oem package for penalized regression is on CRAN

The oem package has been on CRAN for some time now, but with the latest update I expect few structural changes to the user interface. oem is a package...

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Parameter tuning with mlrHyperopt

July 18, 2017
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Parameter tuning with mlrHyperopt

Hyperparameter tuning with mlr is rich in options as they are multiple tuning methods: Simple Random Search Grid Search Iterated F-Racing (via irace) Sequential Model-Based Optimization (via...

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Some Ideas for your Internal R Package

July 18, 2017
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Some Ideas for your Internal R Package

At RStudio, I have the pleasure of interacting with data science teams around the world. Many of these teams are led by R users stepping into the role of...

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