Together with the key people behind the data.table package, Matt Dowle and Arun Srinivasan,  DataCamp developed a brand new interactive course to bring your data analysis skillset up to date with the essentials of the powerful data.table package. Learn more…  The popularity of the data.table package is ... [Read more...]

For this post, I would like to give my sincere thanks to Mr. Helmuth Vollmeier, for providing the long history … Continue reading → [Read more...]

For those readers who are unaware, SVG is absolutely amazing, and if you need some convincing see this 2009 paper/talk from David Dailey Why is SVG Going to Be REALLY BIG?  Most R users should be very well acquainted with graphics and plots magically ... [Read more...]

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I feel like a sculptor who has been using the same metal tools for the last four years and happened to have looked at my comrades and found them sporting new, sleek electric tools. Suddenly all of the hard work put into maintaining and adapting my meta... [Read more...]

dplyr is a package for efficient data manipulation based on the grammar of data manipulation by Hadley Wickham. This package is efficient in manipulating data frames, data tables, databases and more. Dr. Dennis Murphy gave an interactive presentation of the elements that make dplyr the go-to package for data munging ... [Read more...]

Markus Gessman (@MarkusGesmann) did a beautiful job Visualising the seasonality of Atlantic windstorms using small multiples, which was inspired by both a post by Arthur Charpentier (@freakonometrics) on using Markov spatial processes to “generate” hurricanes—which was tweaked a bit by Robert Grant (@robertstats)—and Gaston Sanchez‘s Visualizing Hurricane ... [Read more...]

Julia Code R Code [Read more...]

I'll produce predictions for US car sales by manufacture every month. There are already several blogs that describe the industry and sales that do a great job. Autoblog by the Numbers and Counting Cars are some to mention. Unli... [Read more...]

In this post on RPubs, I demonstrate how to use new functions (psdAdd() and wrAdd()) in the FSA package, along with functions in the dplyr package, to efficiently add Gabelhouse length category and relative weight variables for all species in … Continue reading → [Read more...]

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Suppose you want to create a huge number of pdf files t [...] [Read more...]

Here’s a quick example of how the dplyr package can dramatically improve your code for organising and manipulating dataframes [RPubs]   [Read more...]

An analysis of where the SJDM members are from in the world. The post Part 2 of Who We Are: Society for Judgment and Decision Making (SJDM) appeared first on Decision Science News. [Read more...]

A rather intriguing note that was arXived last week: it is essentially one page long and it compares the power law of the frequency range for the Bernoulli experiment with the power law of the frequency range for the distribution of the last digits of the first 10,000 prime numbers to ... [Read more...]

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While we have a foundation and momentum from the last post “SelectionShare & TimingShare | Masterfully Written by Delightfully Responsive Author” , we can run the Ekholm calculations on some popular funds to see how they have evolved since the early 1980s.  Remember these are my opinions and not investment advice.  I chose ... [Read more...]

Lesson learned, and the wheels keep turning (The Killers – The world we live in) I discovered this site with a huge amount of data waiting to be analyzed. The first thing I’ve done is this simple graph, where you can see relationship between cellular subscribers and obese people. Bubbles ... [Read more...]

Here is the dplyr talk that I recently gave to the Davis R Users’ Group. dplyr is an R library that does basic data manipulation extremely well. It is designed to make the data handling tasks that we all do over and over as easy as possible. It produces highly ... [Read more...]

A surprising entry on arXiv this morning: Richard Vale (from Christchurch, NZ) has posted a paper about the characters appearing in the yet hypothetical next volume of George R.R. Martin’s Song of ice and fire series, The winds of Winter [not even put for pre-sale on amazon!]. Using ... [Read more...]