The bell rings - time to go to practice. Jarnell Stokes heads over to the gym, changes, and starts warming up with his teammates. It's his Junior year in high school. The Memphis, Tennessee native has a lot on his mind; soon he'll have to mak...
It’s a folk theorem I sometimes hear from colleagues and clients: that you must balance the class prevalence before training a classifier. Certainly, I believe that classification tends to...
A new Armadillo release 4.650.1 was released by Conrad a few days ago. Armadillo is a powerful and expressive C++ template library for linear algebra aiming towards...
A new release of the js package has made it’s way to CRAN. This version adds support for compiling Coffee Script....
This is to continue on the topic of using the melt/cast functions in reshape to convert between long and wide format of data frame. Here is the example I found...
Thanks to a nice post by Meghan Duffy on the Dynamic Ecology blog (How do you make figures?), we have some empirical evidence that many figures made in...
Anscombe’s quartet comprises four datasets that have nearly identical simple statistical properties, yet appear very different when graphed. Each dataset consists of eleven (x,y) points. They were
RStudio is excited to announce the general availability (GA) of shinyapps.io. Shinyapps.io is an easy to use, secure, and scalable hosted service already being used by thousands of professionals...
Aggregation splits data into subsets, computes summary statistics on each subset, and reports the results in a conveniently summarized form. The aggregate function is one of the most capable...
This post will demonstrate a downside to rankings-based strategies, particularly when using data of a questionable quality (which, unless one … Continue reading →
by Joseph Rickert Distcomp, a new R package available on GitHub from a group of Stanford researchers has the potential to significantly advance the practice of collaborative computing with...
“The amount of information available in the internet grows every day” thank you captain Obvious! by now even my grandma is aware of that!. Actually, the internet...
As promised from my recent article, here's my tutorial on how to layout and design an infographic in R. This article will serve as a template for more infographic...
This article may also be found on RPubs: http://rpubs.com/hughes/63269 In the list of worst to best way to test for effect in GLMM the list on http://glmm.wikidot.com/faq state that...
RMySQL version 0.10.2 has appeared on CRAN. This is a maintenance release to streamline the build process on various platforms. Most importantly,...
It was a pleasure to appear live on theCUBE last week while attending the Strata conference. In my interview with Jeff Kelly and John Furrier, I talked about the...
Win-Vector LLC’s Nina Zumel and John Mount are proud to announce their new data science video course Introduction to Data Science is now available on Udemy. We designed the...
by Marek Gagolewski, Maciej Bartoszuk, Anna Cena, and Jan Lasek (Rexamine). Introduction In a recent blog post we explained how we managed to set up a working Hadoop environment...
Dici che il fiume trova la via al mare e come il fiume giungerai a me (Miss Sarajevo, U2) One way to calculate approximately the area of some place is to...
Consider the following dataset, with (only) ten points x=c(.4,.55,.65,.9,.1,.35,.5,.15,.2,.85) y=c(.85,.95,.8,.87,.5,.55,.5,.2,.1,.3) plot(x,y,pch=19,cex=2) We want to get – say – two clusters. Or more specifically, two sets of observations, each of...
RStudio’s data viewer provides a quick way to look at the contents of data frames and other column-based data in your R environment. You invoke it by clicking on...
by Andrie de Vries R has strong support for parallel programming, both in base R and additional CRAN packages. For example, we have previously written about foreach and parallel...
The other day I got stuck working with a huge data set using data.table in R. It took me a little while to realise that I had...
I spent last week at the Strata 2015 Conference in San José, California. As always, Strata made for a wonderful conference to catch up on the latest developments on...
I often find myself giving people suggestions about how to learn R, so I decided to put together a flow chart. This is geared toward typical psychology or cognitive...
No revelations here, just a little R tip for generating more readable documents. There are times when I want to show code in a document, but I don’t want...
RStudio’s code editor includes a set of lightweight Vim key bindings. You can turn these on in Tools | Global Options | Code | Editing: For those not familiar,...
We’re busy at work on the next version of RStudio (v0.99) and this week will be blogging about some of the noteworthy new features. If you want to try...
Plotly: collaborative, publication-quality graphing.
