This coming Monday we start the first semester in Canterbury (and in New Zealand for that matter). We are all looking forward to an earthquake-free year; more realistically, I’d be happy with low magnitude aftershocks. The Wall Street Journal reports … Continue reading → [Read more...]

If you do parallel processing in R on Windows, then you probably have heard of the doSMP package. However, it was recently removed from the CRAN repository with the terse message: Package ‘doSMP’ was removed from the CRAN repository. Revolution … Continue reading → [Read more...]

The Winter 2012 edition of Sybase's Financial Services Viewpoint newsletter includes two articles related to R. The "Industry Insight" article "R is Hot" (written by yours truly) is a one-page summary of the R phenomenon: what it is, how it's used, and how it's revolutionizing data analysis. The "Industry Insight" article ... [Read more...]

Now that Rcpp 0.9.10 is released and on CRAN, other packages can take advantage of a small change needed to make use of the quasi-output stream Rcpp::Rcout. So the new release 0.2.35 of RcppArmadillo does just that---and input/output from Armadillo... [Read more...]

Correlation matrices are a common way to look at the dependence of a set of variables. When the variables have spatial relationships, the correlation matrix loses some information.Lets say you have repeated observations, each one being a matrix. For ex... [Read more...]

[This article was first published on NIR-Quimiometría, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your [Read more...]

I’ve largely avoided “time” in R to date, but following a chat with @mhawksey at #dev8d yesterday, I went down a rathole last night exploring a few ways of visualising a Twitter user timeline and as a result also had a quick initial play with some time handling ... [Read more...]

A new release 0.9.10 of Rcpp is now on CRAN and in Debian. This is mostly internal release with a little bit of code reorgination (some of which will be used by a forthcoming RcppArmadillo release), some changes to make R CMD check happy, and one or ... [Read more...]

I was browsing stackoverflow when suddenly I noticed: 10 thousand questions tagged! I started using Stackoverflow almost exactly a year ago and remember that the counter was about 3 thousand at the time. It is a beautiful example of how fast the R community is … Continue reading → [Read more...]

The Chinese character Jiong (囧) is now widely used for expressing ideas or feelings such as annoyance, shock, embarrassment, awkwardness, scorn. The function plot of y=1/(x^2-1) looks very similar of this symbol. I use ggplot2 to draw the symbol of Jiong. Read More: 359 Words Totally [Read more...]

This post will consider some useful functions for dealing with data frames during data processing and validation. Consider an artifical data set create using the expand.grid function where there are duplicate rows in the data frame. __ des = expand.grid(A = c(2,2,3,4), B = c(1,3,5,5,7)) __ des A B 1 2 1 2 2 1 [...] [Read more...]

Many ecologists are R users, but we vary in our understanding of the math and statistical theory behind models we use. There is no clear consensus on what should be the basic mathematical training of ecologists. To learn what the community thinks, we ... [Read more...]

A milestone, though not that exciting as questions go. Still, if you haven’t yet joined the cult of Stack Exchange, take a look here. Tagged: r, stackoverflow [Read more...]

This is the second part in a three part series on teaching R to MFE students at CUNY Baruch. The …Continue reading » [Read more...]

This video shows how to obtain and install R on the Mac OS X platform. It also shows a few basic functions in R, such as how to install packages in R and load them for use. A PC version will follow shortly [Read more...]

Taylor-Russell tables (Taylor & Russell, 1939) are designed to estimate the percentage of future employees who will be successful on the job if a particular selection method (eg. test, assessment center, interview) is used. I have already described the kibit … Weiterlesen → [Read more...]

Psych your mind has an interesting blog post on using p curves to detect dodgy stats in a a volume of published work (e.g., for a researcher or journal). The idea apparently comes from Uri Simonsohn (one of the authors of a recent paper on dodgy s... [Read more...]

I’ve played around a bit with the Eclipse Color Themes plugin by Felix Dahlke and Roger Dudler as they added support for the R editor that ships with plugin StatET late last year. The outcome is a little color theme called rappster. The nice thing with those color themes ... [Read more...]

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Mirai Solutions GmbH (http://www.mirai-solutions.com) is pleased to announce the availability of XLConnect 0.1-8 on CRAN. The most prominent new features/extensions are an improved package vignette which provides more information and examples to get people started with the package. A new … Continue reading → [Read more...]