The "tikzDevice" package

October 20, 2010
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The "tikzDevice" package

The tikzDevice package is quite amazing. Here are two graphs I just made, with (lower) and without (upper) using the tikzDevice package. The difference in quality is huge.Since the LaTeX source file for the figure is quite large in size and may take si...

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The 2009 homicide data for Chihuahua has been updated

October 20, 2010
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The 2009 homicide data for Chihuahua has been updated

As I described in this post, the reported number of homicides in Chihuahua during 2009 turned out to be incomplete. Guess what? The SNSP just released an updated version of the homicide data, and Chihuahua went from having 2,523 homicides to 3,156. My estimate was 3,256, so I came pretty...

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The 2009 homicide data for Chihuahua has been updated

October 20, 2010
By
The 2009 homicide data for Chihuahua has been updated

As I described in this post, the reported number of homicides in Chihuahua during 2009 turned out to be incomplete. Guess what? The SNSP just released an updated version of the homicide data, and Chihuahua went from having 2,523 homicides to 3,156. My estimate was 3,256, so I came pretty...

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R Links for the Beginner on World Statistics Day

October 20, 2010
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In honor of the first World Statistics Day I thought I would share some of my favorite R links.  R is a free software statistical computing environment for performing all sorts of data and mathematical manipulation.Introduction and TutorialsR Tuto...

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R Links for the Beginner on World Statistics Day

October 20, 2010
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In honor of the first World Statistics Day I thought I would share some of my favorite R links.  R is a free software statistical computing environment for performing all sorts of data and mathematical manipulation.Introduction and TutorialsR Tuto...

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Hold on to your hats: it’s World Statistics Day!

October 20, 2010
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Apparently today is the first ever World Statistics Day. I only knew about it because I'd seen a couple of passing references to it from the stats folks I follow on Twitter. But I guess this UN-sponsored event is a big deal, judging from the official website: The celebration of the World Statistics Day will acknowledge the service provided...

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Trading secrets

October 20, 2010
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Trading secrets

Recently I had the opportunity to do a job swap with one of the guys in the laboratory here at HSL.  I helped out with the mass-spectrometry and James helped me with the data analysis.  Two very useful things came out of this. Firstly, it’s been very informative to see how the data I get

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Programming with R – Function Basics

October 20, 2010
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One of the benefits of using R for statistical analysis is the programming language which allows users to define their own functions, which is particularly useful for analysis that needs to be repeated. For example, a monthly output from a database may be provided in a pre-determined format and we might be interested in running

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Central Limit Theorem A nice illustration of the Central Limit…

October 20, 2010
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Central Limit Theorem
A nice illustration of the Central Limit…

Central Limit Theorem A nice illustration of the Central Limit Theorem by convolution.in R: Heaviside 0,1,0) }HH

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upgrade R – F77 cause compilation error

October 20, 2010
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I try to compile the source code of R 2.12 on CentOS, but it throw an error when trying to install *cluster*. * installing *source* package ‘cluster’ ... Read More: 3800 Words Totally

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upgrade R – F77 cause compilation error

October 20, 2010
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I try to compile the source code of R 2.12 on CentOS, but it throw an error when trying to install *cluster*. * installing *source* package ‘cluster’ ... Read More: 3800 Words Totally

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Transactions, and Pondering their Use in Casinos

October 20, 2010
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Transactions, and Pondering their Use in Casinos

A couple of weeks ago, Bradford Cross of FlightCaster posted in Measuring Measures that transactions are the next big data category. I argue that they already are, and from reading his blog post, he seems to suggest this as well but I will admit that I think I missed his point. There are some clear examples of transactions and...

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Monitoring Productivity Experiment

October 20, 2010
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Monitoring Productivity Experiment

For over a year now, i've been collecting how much time i spend in computer and how much of it is actually used in creative/productive activities. By productive activity i mean that the time spent in text editor(emacs), terminal, excel or a datab...

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Coincidence in lotteries

October 19, 2010
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Coincidence in lotteries

Last weekend, my friend and coauthor Jean-Michel Marin was interviewed (as Jean-Claude Marin, sic!) by a national radio about the probability of the replication of a draw on the Israeli Lottery. Twice the same series of numbers appeared within a month. This lotery operates on a principle of 6/37 + 1/8: 6 numbers are drawn

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Happy World Statistics Day!

October 19, 2010
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The United Nations has declared today “World Statistics Day”. I’ve no idea what that means, or why we need a WSD. Perhaps it is because the date is 20.10.2010 (except in North America where it is 10.20.2010). But then, what happens from 2013 to 2099? And do we just forget the whole idea after 3112?

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Example 8.10: Combination dotplot/boxplot (teaching graphic in honor of World Statistics Day)

October 19, 2010
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Example 8.10: Combination dotplot/boxplot (teaching graphic in honor of World Statistics Day)

In honor of World Statistics Day and the read paper that my co-authors Chris Wild, Maxine Pfannkuch, Matt Regan, and I are presenting at the Royal Statistical Society today, we present the R code to generate a combination dotplot/boxplot that is useful...

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EM and Regression Mixture Modeling

October 19, 2010
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EM and Regression Mixture Modeling

Last night, Drew Conway showed me a fascinating graph that he made from the R package data we’ve recently collected from CRAN. That graph will be posted and described in the near future, because it has some really interesting implications for the structure of the R package world. But for the moment I want to

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Introduction to statistical finance with R

October 19, 2010
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Introduction to statistical finance with R

During the first part of our meeting, Nicolas Christou gave an introduction of statistical finance in R, and presented a package he co-authored with previous PhD student David Diez (2010). Video of the talk is below: During the second part, … Continue reading →

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Adap’skiii program

October 19, 2010
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Adap’skiii program

We have just posted the (mostly definitive) program for Adap’skii, January 3-4, The Canyons, Utah. This is taking place just before and as a satellite of the larger MCMSki III conference, January 4-7, same location. The registration for the conference and for lodging is available through the  MCMCSki III registration page, Remember also that this

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An Old Wives Tale from the 2000 Census

October 19, 2010
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An Old Wives Tale from the 2000 Census

With the data from the 2010 US Census to be published early next year, here's a cautionary tale from the 2000 Census. If you take a look at the ratio of numbers of men to women in the 5-Percent "PUMS" sample from the 2000 census over various ages, you'll see an odd spike near age 65: What causes this...

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Fast matrix inversion

October 19, 2010
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Fast matrix inversion

Very similar to what has been done to create a function to perform fast multiplication of large matrices using the Strassen algorithm (see previous post), now we write the functions to quickly calculate the inverse of a matrix.To avoid rewriting pages and pages of comments and formulas, as I did for matrix multiplication, this time I'll...

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Fast matrix inversion

October 19, 2010
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Fast matrix inversion

Very similar to what has been done to create a function to perform fast multiplication of large matrices using the Strassen algorithm (see previous post), now we write the functions to quickly calculate the inverse of a matrix.To avoid rewriting pages and pages of comments and formulas, as I did for matrix multiplication, this time I'll...

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Middlesboro Kentucky: Pitch Black?

October 19, 2010
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Middlesboro Kentucky: Pitch Black?

In his august draft of Hansen2010, Dr. Hansen makes the following claim: “We present evidence here that the urban warming has little effect on our standard global temperature analysis.  However, in the Appendix we carry out an even more rigorous test. We show there that there are a sufficient number of stations located in “pitch

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Listing gene IDs from hyperGTest

October 19, 2010
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hyperGTest compute Hypergeomtric p-values for over or under-representation of each GO term in the specified category among the specified gene set. *geneSample* was used as an example. Read More: 1329 Words Totally

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Listing gene IDs from hyperGTest

October 19, 2010
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hyperGTest compute Hypergeomtric p-values for over or under-representation of each GO term in the specified category among the specified gene set. *geneSample* was used as an example. Read More: 1329 Words Totally

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Sunbelt workshop on SNA in R

October 19, 2010
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Sunbelt workshop on SNA in R

The next Sunbelt Social Networks Conference (XXXI) will take place in February 2011 in St Pete Beach, Florida, USA. The preliminary program is available here. There is still time to submit abstracts (deadline is on October 29, 2010). At the conference I will be teaching the workshop “Introduction to Social Network Analysis with R”. It

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Ideas for World Statistics Day

October 19, 2010
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Ideas for World Statistics Day

World Statistics Day is 2010 October 20.  If you work with data (or you should), then you are a statistician and this is a day for you. Try the Monte Hall problem on your mother. Start reading Bad Science.  I mean the book, but here’s the blog. Take a step towards breaking your spreadsheet addiction … Continue reading...

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NppToR 2.5.0

October 18, 2010
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NppToR 2.5.0 supports R-2.12.0, improves saved settings and install, also retires the syntax generator.

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Hadley on a Postage Stamp?

October 18, 2010
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Hadley on a Postage Stamp?

Yet another reason to check out the ggplot2 wiki!

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