R for the web

May 27, 2011
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There is a nice R module for apache: rApache. So you can easily publish statistics.

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Collaborative R coding using Dropbox

May 27, 2011
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Collaborative R coding using Dropbox

I do like Dropbox. I’m a big fan of easy to use solutions to common problems. For me I work at two different sites and I do a significant amount of work at my desktop machine at home as well as on my laptop. Dropbox solved the problem of synchronising files between

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Handling Errors Gracefully

May 27, 2011
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In R functions sometimes produces warnings or errors. In the case of errors execution of a function or a series of commands can get halted when an error occurs, which can in some cases be frustrating especially if we want to continue our calculations. There are various functions available in R for dealing with errors

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Norvig and the Nature of Modern Science

May 27, 2011
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In this, Chomsky is in complete agreement with O’Reilly. (I recognize that the previous sentence would have an extremely low probability in a probabilistic model trained on a newspaper or TV corpus.)1 Anyone who considers themself an intellectual should be required to read this new essay by Peter Norvig. It’s the best summary I’ve ever

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Presentations from R/Finance 2011 available

May 27, 2011
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Last month's R/Finance 2011 conference in Chicago was an outstanding event, bringing together some of the best minds in applying R to financial data. Presentations from the speakers are now available for download, with a wealth of useful information there for anyone working in quantiative finance. Not to be missed, though, is John Bollinger's (yes, that John Bollinger) retrospective...

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Notes to Self: Getting Rapache working in Natty Narwhal (Ubuntu/Linux)

May 27, 2011
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Notes to Self: Getting Rapache working in Natty Narwhal (Ubuntu/Linux)

In this post, I cover my experiences in getting Rapache working in the latest version of Ubuntu (11, Natty Narwhal). …Continue reading »

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Beginne..R 1.0

May 26, 2011
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Opening this blog is a step in a long journey of discovery, learning and frustration. To begin with I would consider myself a beginner R user, I am getting better, but I am not about to write a package any time soon. I started using R about three years...

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Hammersley and Handscomb 1964 on line

May 26, 2011
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Hammersley and Handscomb 1964 on line

Through the webpage of the Advanced Monte Carlo Methods I & II, given a few years ago by Michael Mascagni at ETH Zürich, I found a link to the scanned version of the 1964 book Monte Carlo Methods by Hammersley and Handscomb. This is a short book, with less than 150 pages, especially if one

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Clustering with Currencies and Fidelity Funds

May 26, 2011
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Clustering with Currencies and Fidelity Funds

Great news came yesterday with the release of the R In Finance 2011 Presentations.  I must attend next year after seeing all that I missed.  The Iacus: Statistical Analysis of Financial Time Series and Option Pricing in R (pdf) presentation o...

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New online R courses from Statistics.com

May 26, 2011
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Online training provider Statistics.com has introduced a couple of new R-related courses which are well worth checking out. These are all self-paced on-line courses, with materials by and interactive feedback from leading R gurus. Current R users looking to take their programming skills to the next level will be particularly interested in the Advanced Programming in R course from...

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another look at CRAN Task Views

May 26, 2011
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another look at CRAN Task Views

We've been impressed with how helpful the CRAN Task Views are in guiding us in R as we wend our way through the huge number of add-on packages (3021 as of May, 2011). These are web pages that are maintained by volunteers with expertise in a specified ...

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Simple pattern detection in numerical data

May 26, 2011
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Simple pattern detection in numerical data

A while ago I helped out a colleague who was testing some methods to detect economic (in)activity of companies, based on their quarterly tax declarations (our institute has access to such data). One of the thing my colleague wanted was t...

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BMS and the Fixed Effects Estimator – A Tutorial

This tutorial illustrates how to use Bayesian Model Averaging (BMA) with panel data using the R package BMS.Contents Introduction Fixed Effects Estimation by Demeaning the Data Fixed Effects Estimation with Dummy Variables Bibliography Downloads A ...

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Panel Estimation

This tutorial should illustrate how to employ bms with panel data. For the purpose of illustration we will use the data put forward in Moral-Benito (2011) and made publicly available at

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Cricket fever again

May 26, 2011
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Cricket fever again

England take on Sri Lanka in a test series starting today. After watching Cricket world cup 2011 and witnessing India play in quarter final, semi final and the finale in stadiums all over India, I had little appetite for any of the IPL 2011 matche...

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RcppArmadillo 0.2.20

Conrad Sanderson is preparing version 2.0.0 of his Armadillo templated C++ library for linear algebra and has released a first public beta version 1.99.2. This has been folded into a new release of the RcppArmadillo wrapper for R based on our Rcpp li...

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Sweave and pgfSweave in LyX 2.0.x (experimental)

May 25, 2011
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bout half a year ago, I wrote a post on the configuration of (pgf)Sweave and LyX, which was intended to save us some efforts in going through all the details during the configuration. Now many things have changed: LyX 2.0 has internal support for Sweave, and fortunately I have been in touch with the developers

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R / Finance 2011 presentations

I just sent the text below to the r-sig-finance list: The organizing committee for the R/Finance 2011 conference is pleased to announce the availability of presentation slides from the 3rd annual R/Finance conference. This year's two-day conference...

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Eigen-who? How Can I Write About Eigen-anything and Expect You to Read?

May 25, 2011
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Eigen-who? How Can I Write About Eigen-anything and Expect You to Read?

After the very nice Convore reply @timelyportfolio some of your posts include "eigenvalue ratio plots" -- kindly tell us what they show and how they might be useful in constructing a portfolio. I felt like I should at least attempt to offer a little m...

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sab-R-metrics: Kernel Density Smoothing

May 25, 2011
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sab-R-metrics: Kernel Density Smoothing

Last time I left you, I had gone over some basics of doing loess regression in R. If you remember, loess is a sort of regression that allows wigglyness in your regression of some dependent variable Y on some independent variable X (I will generalize t...

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Getting Started with Some Baseball Data

May 24, 2011
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With all of the discussions (hype?) regarding applied statistics, machine learning, and data science, I have been looking for a go-to source of data unrelated to my day-to-day work. I loved baseball as a kid. I love baseball now. I love baseball stats....

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Utility Spread and Financial Turbulence Part 2 with Utility Slope

May 24, 2011
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Utility Spread and Financial Turbulence Part 2 with Utility Slope

THIS IS NOT INVESTMENT ADVICE.  YOU ARE RESPONSIBLE FOR YOUR OWN GAINS AND LOSSES. I did not intend for this to be a two-part series but I just could not be complacent with Utility Spread and Financial Turbulence (for avid readers, there was a sm...

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A simple Big Data analysis using the RevoScaleR package in Revolution R

May 24, 2011
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A simple Big Data analysis using the RevoScaleR package in Revolution R

This post from Stephen Weller is part of a series from members of the Revolution Analytics Engineering team. Learn more about the RevoScaleR package, available free to academics as part of Revolution R Enterprise — ed. The RevoScaleR package, installed with Revolution R Enterprise, offers parallel external memory algorithms that help R break through memory and performance limitations. RevoScaleR...

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R, JAGS and ggplot2

May 24, 2011
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R, JAGS and ggplot2

Last week a question was asked on the ggplot2 list about using ggplot2 and jags in R (). Here’s what was my answer (a bit updated): Using as an example the school dataset from R2WinBUGS package: Than you can use the mcmcplots package which give a “feel” of ggplot2: If you really want to use

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Terrain Classification Experiment 2: GRASS, R, and the raster package

May 24, 2011
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Terrain Classification Experiment 2: GRASS, R, and the raster package

Quick post on terrain classification, based on some trouble folks were having with a previous example on Windows. With the spgrass6 package, raster stacks are created by loading several GRASS files at once: x <- readRAST6(vname=c('beam_sum_m...

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KDnuggets: R used in 1 in 4 analytics projects

May 24, 2011
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The most recent KDnuggets poll asked, "Which data mining/analytic tools you used in the past 12 months for a real project". Amongst all commercial and open-source tools, open-source R was the second most-frequently cited, by 23.3% or about 1 in 4 respondents. (The most frequent was the open-source data mining tool, RapidMiner.) See the full poll results at the...

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Participate in the 2011 Rexer Data Mining Survey

May 23, 2011
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Last year's Rexer Data Mining Survey reported that R is used by more data miners than any other tool. If you're using R for data mining or data analysis generally, be counted at the 2011 Data Miner Survey (use access code: RL3X2), which closes in early June. Here's some background on the survey: The survey is conducted annually by...

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News about speeding R up

May 23, 2011
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News about speeding R up

The most visited post ever on the ‘Og was In{s}a(ne), my report on Radford Neal’s experiments with speeding up R by using different brackets (the second most populat was Ross Ihaka’s comments, “simply start over and build something better”). I just spotted two new entries by Radford on his blog that are bound to rekindle the

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