First, before starting this post, I’d like to give one last comment about my previous post: I called Vanguard to … Continue reading → [Read more...]

REDDITORS’ BEFORE AND AFTER MEASUREMENTS ANALYZED Click to enlarge How many pounds do you need to lose in order to reduce your waistline by one inch? How many kilos do you need to lose to reduce your waistline by one centimeter? We wanted to find out. We were having trouble ... [Read more...]

Occupancy modeling is possible in Stan as shown here, despite the lack of support for integer parameters. In many Bayesian applications of occupancy modeling, the true occupancy states (0 or 1) are directly modeled, but this can be avoided by marginalizing out the true occupancy state. The Stan manual (pg. 96) gives an ... [Read more...]

Estimated Read Time: Under 5 minutes This is a quick post about a quick little experiment I tried lately. I saw a recent post about how red and blue color scales on political heat maps can be misleading--primarily because human perception is not very good at discriminating between shades of purple ... [Read more...]

[Read more...]

This post was written by the team behind DataCamp, the online interactive learning platform for data science.   After being dubbed “sexiest job of the 21st Century” by Harvard Business Review, data scientists have stirred the interest of the general public. Many people are intrigued by this job, namely because the ... [Read more...]

Further to the success of the EARL2014 Conference we are delighted to announce that EARL2015 will be held in London on the 15-16th September 2015. Abstracts are invited for [Read more...]

by Joseph Rickert The igraph package has become a fundamental tool for the study of graphs and their properties, the manipulation and visualization of graphs and the statistical analysis of networks. To get an idea of just how firmly igraph has become embedded into the R package ecosystem consider that ... [Read more...]

Making a slight digression from last month’s Probable Points and Credible Intervals here is how to summarize a 2D posterior density using a highest density ellipse. This is a straight forward extension of the highest density interval to the situation where you have a two-dimensional posterior (say, represented as ... [Read more...]

Last week I came across a graphic that plots changes in the treasury yield curve from 1982 through 2012. For those unfamiliar, the yield curve shows the level of interest rates available to investors at a series of times to maturity or terms. I won't go into too much detail here, but ... [Read more...]

[Read more...]

In case you missed them, here are some articles from October of particular interest to R users. R hits a new milestone with 6,000 CRAN packages, and R 3.1.2 released. Revolution Analytics announces Revolution R Open, a supported and enhanced downstream distribution of R. (Learn more at the webinar on Wednesday November 12.) ... [Read more...]

For the 2015 NBA season, the only exciting Lakers news is the return of the Kobe show and Charles Barkley’s Lakers Lent.The Lakers started the season with 0 wins and 5 losses, amazingly bad. The round mound of rebound started Lakers Lent, fasting until the Lakers won. This week, Chuck finally ... [Read more...]

See this page. We're not done with them all but chapter 3 and 4 are there and the regression chapters are not too far behind. The Rnw files (using knitr LaTeX) are there along with the corresponding pdf files. You may have better solutions than ... [Read more...]

The Program of AusDM 2014 Conference is now available at http://ausdm14.ausdm.org/program. It features two keynote talks, one on Learning in Sequential Decision Problems by Prof Peter Bartlett from UC Berkeley, and the other on Making Sense of a Random World through … Continue reading → [Read more...]

I have worked on big data in my work with QuBit in London. In my research I increasingly find the tools I learnt there to be extremely useful. The keywords are smart data management for big data, such as hadoop and hive for querying just the right set of data ... [Read more...]

[Read more...]

Following on from my recent experience with deleting files using R, I found myself needing to copy a large number of raster files from a folder on my computer to a USB drive so that I could post them to … Continue reading → [Read more...]

Sorry for the blogging break. I’ve got a few planned for the next few weeks based on some work I’ve been doing. In the meantime, you should check out “Do we Need Hundreds of Classifiers to Solve Real World Classification Problems?” by Manuel Fernandez-Delgado at JMLR. They took ... [Read more...]

by Matt Sundquist Plotly, co-founder Plotly is a platform for data analysis, graphing, and collaboration. You can use ggplot2, Plotly's R API, and Plotly's web app to make and share interactive plots. Now, you can you can also make 3D plots. Immediately below are a few examples of 3D plots. ... [Read more...]