June 2011

David Banks on Reproducible Research

June 8, 2011 | BioStatMatt

Just got an email linking to Reproducible Research: A Range of Response, in the new journal Statistics, Politics, and Policy 2(1) by David Banks, who is also the journal's editor. Interestingly, the commentary doesn't mention the journal's policy (if one exists) on the reproducibility of research submitted there. Banks' writing is ... [Read more...]

Stratigraphic diagrams using analogue

June 8, 2011 | ucfagls

One of the routine tasks palaeoecologists do is plot data on species composition or geochemical proxies say along a sediment core or stratigraphic sequence. These diagrams are the canonical way of displaying stratigraphic data in this field. An example of … Continue reading → [Read more...]

Generating unique random IDs

June 7, 2011 | nzcoops

Recently I was asked to help create random IDs for someone. At first I thought, ‘Ah yup, 1:x (1,2,3, …,x), job done’. Then I thought that there had to be a R function/package to create better looking IDs, to which I didn’t find one, if there is, please let ... [Read more...]

How to fit power laws

June 7, 2011 | Scott Chamberlain

A new paper out in Ecology by Xiao and colleagues (in press, here) compares the use of log-transformation to non-linear regression for analyzing power-laws.They suggest that the error distribution should determine which method performs better. When you...
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A Quantstrat to Build on Part 2

June 7, 2011 | klr

As I explore additional functionality of quantstrat and make changes to my original post A Quantstrat to Build On, I will write multiple posts, and hopefully, the finished product will not be so overwhelming to comprehend.  Also, it might highligh...
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K-Means Clustering on Big Data

June 7, 2011 | Joseph Rickert

In this post Joseph Rickert demonstrates how to build a classification model on a large data set with the RevoScaleR package. A script file for use with Revolution R Enterprise to recreate the analysis below is at the end of the post, and can also be downloaded here -- ed. ... [Read more...]

R for Data Mining

June 6, 2011 | David Smith

Statistics and data mining often get bundled together, but (in my opinion), they're generally different practices with different goals. As a language designed for statistics, much of R's core functionality is focused on exploring and understanding data: model design, inference, and visualization. But when your goal is simply to get ... [Read more...]

In case you missed it: May Roundup

June 6, 2011 | David Smith

In case you missed them, here are some articles from May of particular interest to R users. A review of "R Cookbook", a new how-to book for R programmers. A detailed example of using the RevoScaleR package to analyze a large airline data set. A new guide for R beginners, "... [Read more...]

Shared Ecological Modelling References

June 6, 2011 | » R

05.06.2011 Today i started to create a list of books and articles about ecological modelling. In this list you will not only find general books about modelling but also books about spatial analysis, image analysis and other (in my opinion) important techniques useful in the context of ecological modelling. For the ... [Read more...]

10 R One Liners to Impress Your Friends

June 5, 2011 | datadebrief

Following the trend of one liners for various languages (Haskell, Scala, Python), here's some examples in RMultiply Each Item in a List by 2#listslapply(list(1:4),function(n){n*2})# otherwise(1:4)*2 Sum a List of Numbers#listslapply(list(1:4),sum)# oth... [Read more...]

An application of aggregate() and merge()

June 5, 2011 | Tony Cookson

Today, I encountered an interesting problem while processing a data set of mine. My data have observations on businesses that are repeated over time. My data set also contains information on longitude and latitude of the business location, but unfort...
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Conway’s Game of Life in R with ggplot2 and animation

June 5, 2011 | ramhiser

In undergrad I had a computer science professor that piqued my interest in applied mathematics, beginning with Conway’s Game of Life. At first, the Game of Life (not the board game) appears to be quite simple — perhaps, too simple — but it has been widely explored and is useful for ... [Read more...]

Environments in R

June 4, 2011 | Christopher Bare

One interesting thing about R is that you can get down into the insides fairly easily. You're allowed to see more of how things are put together than in most languages. One of the ways R does this is by having first-class environments. At first glance, environments are simple enough. ...
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