Monthly Archives: August 2012

Visually weighted regression in R (à la Solomon Hsiang)

August 30, 2012
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Visually weighted regression in R (à la Solomon Hsiang)

, and also the discussions on the Statistical Modeling, Causal

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F1 2012 Mid-Season Review

August 30, 2012
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F1 2012 Mid-Season Review

Rather belatedly, I got around to posting a series of posts summarising the Formula One season to date: F1 2012 Mid-Season Review – Grid/Classification Analysis: for example, how do the drivers’ grid and final classifications compare? F1 2012 Mid-Season Review – Pit Stops: for example, how does pit stop performance across the teams compare? F1

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Late to the ggplot2 party

August 29, 2012
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I have resisted learning the popular R graphics package, ggplot2. I dismissed ggplot2 as primarily useful for exploratory graphics and rationalized my avoidance of ggplot2 by assuming that it would require just as many (or more) lines of code as the R base package to whip the default plots into publication-quality figures. The few times

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Virginia: Comparison of Registered Voter Counts to Census Voting Age Population

August 29, 2012
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Virginia: Comparison of Registered Voter Counts to Census Voting Age Population

By Earl F Glynn | Franklin Center A comparison of US Census voting age population data in Virginia to voter registration data shows only one locality, Surry County, with about 100% of the voting age population registered to vote. Six other localities have about 95% of their voting age population registered:  Craig County, Isle of

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Processing Data from a Statistica Worksheet Using R

August 29, 2012
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Processing Data from a Statistica Worksheet Using R

Context: I work with data from non-profit organizations, and so a big concern in many of my analyses is if and how much people are donating from one year to the next.  One of the  things I normally like to do … Continue reading →

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R does CSI: Using R to nail break-in suspects

August 29, 2012
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R does CSI: Using R to nail break-in suspects

You've probably heard (or seen in TV shows) how the unique pattern of rifling in a gunbarrel generates forensic evidence: microscopic scoring on the bullets left at the scene of the crime can be linked to the shooter by matching the marks to the firearm. What you might not know is that the same technique can be applied to...

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back from down under

August 29, 2012
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back from down under

After a sunny weekend to unpack and unwind, I am now back to my normal schedule, on my way to Paris-Dauphine for an R (second-chance) exam. Except for confusing my turn signal for my wiper, thanks to two weeks of intensive driving in four Australian states!, things are thus back to “normal”, meaning that I

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Basic documentation for soilDB package (R) now available

August 29, 2012
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A proper introduction to the soilDB package is now available here. Installation and basic usage are covered. More detailed, task-specific documentation on aqp and soilDB will be available soon. read more

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…Now With More Bacon (2008)!

August 29, 2012
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…Now With More Bacon (2008)!

I’m sure that Carl Bacon sighs deeply when he reads such headlines, but it is clearly appropriate in this case. Perhaps you remember that I proposed a Google Summer of Code project for 2012 around a considerable code contribution to PerformanceAnalytics from Diethelm Wuertz at ETHZ. That code was focused on adding a large number

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Plotting model fits

August 29, 2012
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Plotting model fits

We all know that it is important to plot your data and explore the data visually to make sure you understand it. The same is true for your model fits. First, you want to make sure that the model is fitting...

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