I got quite inspired by the EXIF with R post on the Timely Portfolio blog and decided to do a similar analysis with my photographic database. The Data The EXIF data were dumped using exiftool. This command uses some of the powerful features of the bash shell. If you are ... [Read more...]

Over the course of the next few days, I'm going to try to find enough time to build up a reasonably simple simulation of insurance exposure and claims. I'll be taking a hierarchical view of the underlying process. As with pretty much everything that I write about, I'm writing about ... [Read more...]

After a couple all-nighters we’re finally done with our undergraduate statistics thesis. The abstract provides a brief overview of what we were trying to accomplish: We explore the possibility of improving data analysis through the use of interactive visualization. Exploration of data and models is an iterative process. We ... [Read more...]

This is a lecture post for my students in the CUNY MS Data Analytics program. In this series of lectures …Continue reading » [Read more...]

At the end of the last post, the reader was left assuming respondent homogeneity without any means for discovering if all of our customers adopted the same feature prioritization. To review, nine features were presented one at a time, and each time res... [Read more...]

Sometimes I have the desire to plot both on the linear and on the log scale. To save space just two figures is not my solution. I want to reuse the x-axis, legend, title. This post examines possibilities to do so with standard plot tools, lattice and g... [Read more...]

Introduction Today, I will begin a series of posts on numerical integration, which has a wide range of applications in many fields, including statistics.  I will introduce with trapezoidal integration by discussing its conceptual foundations, write my own R function to implement trapezoidal integration, and use it to check that ... [Read more...]

In this post, I look at crime rates (per 100,000 people) in 2012 for different crimes in different states.  Data from FBI's Uniform Crime Reports site were used for this analysis. The methodology used by the FBI and the caveats associated wit... [Read more...]

I've had a statistical question that I've wanted to answer for more than 20 years. In college, I often played the strategy game “Axis & Allies” with friends. (Hi Brad, Rob, Brady and Marty!) The game is a crude simulation of the second world war, with various military units available to the ... [Read more...]

A maintenance release (now at version 0.1.2) of my RcppDE package (previously described in these two posts) is now CRAN. More details about the package are available in the vignette also included in the RcppDE R package. Changes were minimal and dr... [Read more...]

A maintenance release of my random package for truly (hardware-based) random numbers (pulled from random.org) is now on CRAN. It's been a while since previous releases. The package is described in a detailed vignette as well as in a essay by Mads Haa... [Read more...]

A maintenance release (now at version 0.2.5) of my gcbd package (described only in these two posts) is now CRAN. More details about the package are available in the paper which is also included in the gcbd R package. Changes were minimal and driv... [Read more...]

In an organization with say, more than 10 people, letting users manage their own installations has goat rodeo written all over it. For this reason, I’m guessing your responsibility for software installations is inversely proportional to the size and sophistication of the organization you work for. So, if you’re ... [Read more...]

It has been almost a year since the last release of the analogue package. At lot has happened in the intervening period and although I’ve been busy with a new job in a new country and coding on several other R packages, activity on analogue has also progressed a ... [Read more...]

I am busy working on a project which uses data from the World Wide Lightning Location Network (WWLLN). Specifically, I am trying to reproduce some of the results from Orville, Richard E, Gary R. Huffines, John Nielsen-Gammon, Renyi Zhang, Brandon Ely, Scott Steiger, Stephen Phillips, Steve Allen, and William Read. 2001. “... [Read more...]

In this post, I'll look at a very quick way to look at the relationships in a database. I had a bit of fun with my first network graph and plotting the connections between tables and views seems like a natural extension. Here, I'm going to create a bare bones ... [Read more...]

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DataMarket is the latest data source of financial data accessible from R I came across. A good tutorial can be found here. I updated the table and the descriptions below. Source R Package Free Access Available on CRAN Provider url Yahoo, FRED, Oanda, Google Quantmod Yes Yes Quantmod Quandl Quandl ... [Read more...]

The program for next year's useR! conference in Los Angeles is shaping up nicely, with confirmed speakers including John Chambers (from the R Core Group), David Diez (OpenIntro), Dirk Eddelbuettel (Rcpp, Debian), Jan de Leeuw (Journal of Statistical Software), Martin Mächler (R Core, R Foundation) and Karline Soetaert (author ... [Read more...]

Geomorph users,We have uploaded version 1.1-5 to CRAN. The windows binary has been compiled and the tarball is available. The MAC OSX binary may take a few days (mac users can install the package from source using the tar.gz file). The PDF of helpfiles has not yet been ... [Read more...]