# Monthly Archives: January 2014

## The Meta- State of the Union 2014

January 30, 2014
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Max Ghenis has a nice text analysis of Martin Luther King Jr.'s famous "I Have a Dream" speech. You can read about his methodology here:  Statistics meets rhetoric: A text analysis of "I Have a Dream" in R.This got me wondering about the President Obama's 2014 State of the Union speech. Using his template, you can see...

## Introduction to dplyr: data manipulation made easy(er) and fun(er)

January 30, 2014
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If you are just getting started in R, checkout my post on good references for beginners.  Hadly Wickham has come out with yet another R package that is destined to improve my workflow and let me concentrate less on getting R to do things, and more on my research questions. The package is dplyr, a reboot...

## More SOTU Scaling

January 30, 2014
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A couple of days ago the Monkey Cage featured Ben Lauderdale’s one-dimensional scaling model of US State of the Union addresses. In this post, I replicate the analysis with a closely related model, ask what the scaled dimension actually means, and consider what things would look like if we added another one. The technical details

## Inference for ARMA(p,q) Time Series

January 30, 2014
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$ARMA(1,1)$

As we mentioned in our previous post, as soon as we have a moving average part, inference becomes more complicated. Again, to illustrate, we do not need a two general model. Consider, here, some  process, where  is some white noise, and assume further that . > theta=.7 > phi=.5 > n=1000 > Z=rep(0,n) > set.seed(1) > e=rnorm(n) > for(t...

## Parallelizing #RStats using #make

January 30, 2014
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In the current post, I'll show how to use R as the main SHELL of GNU-Make instead of using a classical linux shell like 'bash'. Why would you do this ? awesomeness Make-based workflow management Make-based execution with --jobs. GNU make knows how to ...

## A First Look at rxDForest()

January 30, 2014
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by Joseph RIckert Last July, I blogged about rxDTree() the RevoScaleR function for building classification and regression trees on very large data sets. As I explaned then, this function is an implementation of the algorithm introduced by Ben-Haim and Yom-Tov in their 2010 paper that builds trees on histograms of data and not on the raw data itself. This...

## dplyr 0.1.1

January 30, 2014
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We’re pleased to announce a new minor version of dplyr. This fixes a few bugs that crashed R, adds a few minor new features (like a sort argument to tally()), and uses shallow copying in a few more places. There is one backward incompatible change: explain_tbl() has been renamed to explain. For a complete list

## roxygen2 3.1.0

January 30, 2014
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We’re pleased to announce a new version of roxygen2. The biggest news is that roxygen2 now recognises reference class method docstrings and will automatically add them to the documentation. 3.1.0 also offers a number of minor improvements and bug fixes, as listed on the github release notice. As always, you can install the latest version with install.packages("roxygen2").

## GMT topography colours (I)

January 30, 2014
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I enjoyed the blog posting by “me nugget”, which I ran across on R-bloggers, and so I decided to try that author’s GMT colourscheme. This revealed some intriguing patterns in the Oce dataset named topoWorld. The following code produces a graph to illustrate. 1. Set up colours as suggested on the “menuggest” blog 1 2 3 4 5 6 7 8 9 ## test GMT colours as...

## GMT topography colours (II)

January 30, 2014
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This follows an item about GMT colours. In the meantime I have found a website illustrating the colours, and also the definition files for those palettes. The palette in question is named GMT_relief, and it is defined in a file that is as follows. # \$Id: GMT_relief.cpt,v 1.1 2001/09/23 23:11:20 pwessel Exp \$ # # Colortable for whole earth...