Monthly Archives: January 2010

Interesting use of levelplot() for time series data

January 16, 2010
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Interesting use of levelplot() for time series data

levelplot example: soil temperature (left) and moisture (right) Several recent articles appeared on the R-bloggers feed aggregator that demonstrated an interesting visualization of time series data using color. This style of visualization was readily adapted for the time...

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Gay Marriage: Another Data Point

January 16, 2010
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Relevant to my earlier post about the relationship between direct democracy and laws prohibiting gay marriage, Pew Research just published poll data showing that a majority of Americans disapprove of same-sex marriage.

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A tale of two visualizations (because it’s Friday)

January 15, 2010
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A tale of two visualizations (because it’s Friday)

GEEK FIGHT!!! says JD Long on Twitter as the New York Times publishes a widely-reposted interactive graphic about Netflix rental data, and the Wall Street Journal also gets into the interactive-viz game with a graphic on bank bonuses. If it's a fight, it's a knockout in the first round, if you ask me. There's no surprise why the Netflix...

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Equivalents to SAS, SPSS modules in R

January 15, 2010
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Bob Muenchen, the author of R for SAS and SPSS Users, has created a handy table listing the R packages that implement the statistical methods included in add-on modules for SAS and SPSS. For example, if you're looking for the equivalent structural equation modeling functions you might be using in PROC CALIS from SAS/STAT or the SPSS "Amos" software,...

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R Tutorial Series: Hierarchical Linear Regression

January 15, 2010
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R Tutorial Series: Hierarchical Linear Regression

Regression models can become increasingly complex as more variables are included in an analysis. Furthermore, they can become exceedingly convoluted when things such as polynomials and interactions are explored. Thankfully, once the potential independe...

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Learning R via Python…or the other way around (Rosetta Stone Talk – 2/3)

January 15, 2010
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Presentation given by Drew Conway at the NYC R Statistical Meetup on January 7, 2010. The January Meetup was the "R Rosetta Stone," and this talk covers R and Python.

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RQuantLib 0.3.2 released

January 14, 2010
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A new version of RQuantLib (a package combining the quantitative analytics of QuantLib with the R statistical computing environment and language) is now out at CRAN and in Debian (where it depends on the 1.0.0 beta of QuantLib that is currently in t...

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RQuantLib 0.3.2 released

January 14, 2010
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A new version of RQuantLib (a package combining the quantitative analytics of QuantLib with the R statistical computing environment and language) is now out at CRAN and in Debian (where it depends on the 1.0.0 beta of QuantLib that is currently in the ...

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RQuantLib 0.3.2 released

January 14, 2010
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A new version of RQuantLib (a package combining the quantitative analytics of QuantLib with the R statistical computing environment and language) is now out at CRAN and in Debian (where it depends on the 1.0.0 beta of QuantLib that is currently in t...

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Typos in Chapters 6-7

January 14, 2010
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Typos in Chapters 6-7

Over the weekend and during the R exams, I managed to complete the solution set for Chapters 6 and 7 of “Introducing Monte Carlo Methods with R”. Chapter 6 only exhibited a few typos, despite me covering most exercises in Chapter 6, hence the merging of both chapters. – in Exercise 6.13, both and

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