Monthly Archives: February 2015

Should you teach Python or R for data science?

February 2, 2015
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Last week, I published a post titled Lessons learned from teaching an 11-week data science course, detailing my experiences and recommendations from teaching General Assembly's 66-hour introductory data science course. In the comments, I received the ...

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My "Top 5 R Functions"

February 2, 2015
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In preparation for a R Workgroup meeting, I started thinking about what would be my "Top 5 R Functions". I ruled out the functions for basic mechanics - save, load, mean, etc. - they're obviously critical, but every programming language has them, so th...

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R … three dots ellipsis

February 2, 2015
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If you have used R before, then you surely have come across the three dots, e.g. In technical language, this is called an ellipsis. And it means that the function is designed to take any number of named or unnamed arguments. By the way, the ellipsis is not a specialty of R. Other programming The post R …...

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Embedding R-generated Interactive HTML pages in MS PowerPoint

February 2, 2015
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Embedding R-generated Interactive HTML pages in MS PowerPoint

By Richard Pugh – Commercial Director, UK.  Usually when I create slide decks these days I used markdown and slidy.  However, I recently was asked to present using an existing Revolution Microsoft PowerPoint template. Trouble is, I’ve been spoilt with … Continue reading →

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RcppStreams 0.1.0

February 2, 2015
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RcppStreams 0.1.0

The new package RcppStreams arrived on CRAN on Saturday. RcppStreams brings the excellent Streamulus C++ template library for event stream processing to R. Streamulus, written by Irit Katriel, uses very clever template meta-programming (via Boost Fu...

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What kind of programmer are you? Stack Exchange can predict it, Shiny can graph it

February 1, 2015
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What kind of programmer are you? Stack Exchange can predict it, Shiny can graph it

I was impressed by Stack Exchange’s recent announcement of their machine learning system, Providence, that guesses what kind of programmer you are based on your Stack Overflow traffic. Stack Exchange uses this to choose what questions to show you on their homepage and to recommend jobs to you in their Careers ads. One admirable feature is that Stack Exchange allows...

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2015.2: Did the New England Patriots experience a decrease in fumbles starting in 2007?

February 1, 2015
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2015.2: Did the New England Patriots experience a decrease in fumbles starting in 2007?

Here's a timely guest entry from Jeffrey Witmer (Oberlin College). As the “Deflate Gate” saga was unfolding, Warren Sharp analyzed “touches per fumble” for NFL teams before and after 2006, when a rule was changed so that teams playing on the road could provide their own footballs (http://www.sharpfootballanalysis.com/blog/). Sharp noted that, for whatever reason, the Patriots went from...

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New release (0.7) of metricsgraphics htmlwidget — grids & rollovers

February 1, 2015
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I’ve updated my metricsgraphics package to version 0.7. The core MetricsGraphics JavaScript library has been updated to version 2.1.0 (from 1.1.0). Two blog-worthy features since releasing version 0.5 are mjs_grid (which is a grid.arrange-like equivalent for metricsgraphics plots and mjs_add_rollover which lets you add your own custom rollover text to the plots. The Grid The

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Some 3D Graphics (rgl) for Classification with Splines and Logistic Regression (from The Elements of Statistical Learning)

February 1, 2015
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Some 3D Graphics (rgl) for Classification with Splines and Logistic Regression (from The Elements of Statistical Learning)

This semester I'm teaching from Hastie, Tibshirani, and Friedman's book, The Elements of Statistical Learning, 2nd Edition. The authors provide a Mixture Simulation data set that has two continuous predictors and a binary outcome. This data is used to demonstrate classification procedures by plotting classification boundaries in the two predictors. For example, the figure below

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R package “fishdynr”

February 1, 2015
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R package “fishdynr”

The fishdynr package allows for the construction of some basic population dynamics models commonly used in fisheries science. Included are models of a single cohort, cohortSim, and a more complex iterative model that incorporates a stock-recruitment re...

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