Monthly Archives: June 2011

How to share your plots better on the web

June 24, 2011
By
How to share your plots better on the web

R bloggers (including me) typically post plots online as portable network graphics (PNG). This is silly because plots generally work better as vector graphics. For years I’ve wanted to host scalable vector graphics (SVG) online, but none of the ima...

Read more »

The R Journal: June 2011

June 24, 2011
By

The latest issue of the R Journal is out, and as always includes many useful articles about using R and R packages. Articles in Volume 3/1 dive into topics including creating test for R packages with test_that; dealing with times, time zones, dates and holidays with timeDate; social network analysis of mailing lists through text mining; creating choropleths and...

Read more »

Drawing heatmaps in R

June 24, 2011
By
Drawing heatmaps in R

A while back, while reading chapter 4 of Using R for Introductory Statistics, I fooled around with the mtcars dataset giving mechanical and performance properties of cars from the early 70's. Let's plot this data as a hierarchically clustered heatmap.# scale data to mean=0, sd=1 and convert to matrix mtscaled <- as.matrix(scale(mtcars))# create...

Read more »

Installing Multiple Version of R in parallel on the same machine – Mac OS X

June 24, 2011
By
Installing Multiple Version of R in parallel on the same machine – Mac OS X

In a few days I'm going to attend a Bioconductor Course; I was requested to install on my MacBook (Mac OS X 10.5.8) a developer version of R (plus ad hoc Bioconductor packages). In order to keep my old R installation ((2.13) along side the ne...

Read more »

Talking The R Journal latest release

June 24, 2011
By
Talking The R Journal latest release

Volume 3/1 of The R Journal has been released. It of course has articles about using R.  In addition it has a feature that I highly support.  In preparation for the UseR! Conference 2011 August 16-18 in Coventry there are two Help Desk articles on making a good technical presentation. Technical presentation Rob Hyndman writes … Continue reading...

Read more »

Multiple plots in R: lesson zero

June 24, 2011
By
Multiple plots in R: lesson zero

Today, in one of my more productive days, I managed to create a sleek R script that plotted several histograms in a lattice, allowing for easy identification of the underlying trend. Although the majority of the time taken consisted of collecting the data and making various adjustments, it took a not inconsiderable amount of work to write the...

Read more »

msg <- "Hello World!"; print(msg)

June 23, 2011
By
msg <- "Hello World!"; print(msg)

Introduction My mom always told me to be polite so I think I should introduce myself first. I’m a 20+ years old Finnish university student studying computer science (2nd year starting) and statistics (first year coming) and mostly interested in &...

Read more »

Table hockey and statistics, part 1

June 23, 2011
By
Table hockey and statistics, part 1

Two hobbys combined I’ve been playing table hockey for little over 8 years now and since the very beginning I’ve been interested in statistics and different software we use while organising tournaments and seasons. I’ve been writing f...

Read more »

The R Journal, Volume 3/1

June 23, 2011
By

The most recent issue of The R Journal was recently published.  If you're not a regular reader, you should at least check out the following three contributed articles (listed in order of appearance).Rmetrics - timeDate PackageDifferential Evoluti...

Read more »

Crashed!!

June 23, 2011
By

This crashes R (sometimes):1 2 f = function( 3 a = {x <- y <- z <- w <- t <- u <- 7} 4 ) environment() 5 6 for (i in 1:1000) { ...

Read more »