Tutorial: Using seplyr to Program Over dplyr

July 22, 2017
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seplyr is an R package that makes it easy to program over dplyr 0.7.*. To illustrate this we will work an example. Suppose you had worked out a dplyr pipeline that performed an analysis you were interested in. For an example we could take something similar to one of the examples from the dplyr 0.7.0 … Continue reading Tutorial:...

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What’s in our internal chaimagic package at work

July 21, 2017
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What’s in our internal chaimagic package at work

At my day job I’m a data manager and statistician for an epidemiology project called CHAI lead by Cathryn Tonne. CHAI means “Cardio-vascular health effects of air pollution in...

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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...

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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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Inter-country inequality and the World Development Indicators by @ellis2013nz

July 21, 2017
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Inter-country inequality and the World Development Indicators by @ellis2013nz

I recently read the high quality book Global Inequality by Branko Milanovic. When reading this sort of thing, I often find I can increase my engagement with a...

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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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How to make interactive maps with Census and local data in R

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

So the goal here is to focus back on Greenville County and have even more granularity. I look at median house prices near Greenville and then overlay the park...

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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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