Monthly Archives: September 2012

Football predictions display

September 9, 2012
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Football predictions display

Having looked at the football data earlier, I wanted to look at predictions for new games. This consists of two parts, getting a predictive model, predicting and displaying the predictions. I decided to do this backwards, first to make the displays. Th...

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Implementing the CountSummary Procedure

Implementing the CountSummary Procedure

In my last post, I described and demonstrated the CountSummary procedure to be included in the ExploringData package that I am in the process of developing.  This procedure generates a collection of graphical data summaries for a count data sequence, based on the distplot, Ord_plot, and Ord_estimate functions from the vcd package.  The distplot function generates both the Poissonness...

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RInside 0.2.8

September 8, 2012
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This morning version 0.2.8 of RInside arrived on the CRAN sites. RInside provides a set of convenience classes which facilitate embedding of R inside of C++ applications and programs, using the classes and functions provided by the Rcpp R and C++ in...

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Using R to connect to a SQL Server and MySQL Database using MS Windows

September 8, 2012
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Connecting to MySQL and Microsoft SQL Server Connecting to a MySQL database or MS SQL Server from the R environment can be extremely useful.  It allows a researcher direct access to the data without have to first export it from a database and then import it from a csv file or entering it directly into

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Violence along Mexico’s Southern Border and Central America

September 7, 2012
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Violence along Mexico’s Southern Border and Central America

Rates for Panama and Nicaragua are from 2009, all other countries 2010. Municipalities which are part of a metro area in Mexico are shown with the metro area homicide rate.Visit the interactive map of homicides Having just posted on violence along Mexico's northern border, I figured it's time to...

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Big Issue with System Backtests

September 7, 2012
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Big Issue with System Backtests

Almost always, when I see a system backtested, the backtest assumes a static portfolio with no contributions or withdrawals.  This assumption only covers an extremely limited subset of my clients.  Cash flows in and out of a portfolio or syst...

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In praise of ProjectTemplate for reproducible research

September 7, 2012
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In praise of ProjectTemplate for reproducible research

As you might know from some of my previous posts, I’m a big fan of making my scientific work reproducible. My main reasons for being so keen on this are: 1. Reproducibility is key to science – if it can’t be reproduced then it can not be verified (that is, the experiment can’t be tried again

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Simulation metamodeling with GNU R

September 7, 2012
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Simulation metamodeling with GNU R

I am one of the organizers of ESSA2013 conference that will take place in September 2013 in Warsaw, Poland. The conference scope is social simulation and in particular methods of statistical analysis of simulation output (metamodeling). As we have just issued Call for Papers for the conference so I decided to post a simple example of a metamodel.Recently I had...

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More on fixed and random effects: Plotting and interpreting

September 7, 2012
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More on fixed and random effects: Plotting and interpreting

In a recent post I showed how plotting model fits can help to interpret higher-order polynomial terms. The key comparison there was between a model that did and did not have the higher order fixed effect terms. If you're going to use this strategy, you need to...

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Video: R, RStudio, Rcmdr & rattle

September 7, 2012
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I did a screencast for my co-workers to show how to get started with R, specifically what a base installation of R looks like, then showing how to improve your workflow using RStudio, Rcmdr or rattle.  The examples are somewhat … Continue reading →Video: R, RStudio, Rcmdr & rattle is an article from randyzwitch.com, a...

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