September 2012

Mapping Bike Accidents in R

September 14, 2012 | Corey Chivers

At last weekend’s Hack Ta Ville event here in Montreal, I joined up with some talented urban planners and web devs to realize Vélobstacles. The idea of the project is to crowd source information on cycling conditions around the city. As with any crowd sourcing project, we were ... [Read more...]

Great Circles, Black Holes, and Community Events Part 3 of 3

September 14, 2012 | 0utlieR

The second community event is the Soldier Hollow Junior Olympics (SoHo), again found in the Heber Valley area. Building upon the previous posts (part 1 and part 2) this one will show an event that has more people coming from greater distance. Take the bar charts for the number of participants and ... [Read more...]

Mid-September flotsam

September 14, 2012 | Luis

This is one of those times of the year: struggling to keep the head above the water, roughly one month before the last lecture of the semester. On top trying to squeeze trips, meetings and presentations in between while dealing … Continue reading → [Read more...]

New book: “Modeling Psychophysical Data in R”

September 14, 2012 | Simon Barthelme

Ken Knoblauch wrote to inform me that Springer has just released a book he coauthored with Larry Maloney on statistical methods in psychophysics. The book is called “Modeling Psychophysical Data in R” and covers both classical psychophysical analyses (Signal Detection Theory) and more recent methods (e.g. Mixed Models). Ken ... [Read more...]

OO in R

September 13, 2012 | Christopher Bare

"Is there a package for obfuscating code in #rstats?", someone asked. "The S4 object system?!" came the snarky reply. If you're smiling right now, you know that it wouldn't be funny if it weren't at least a little bit true. Options: S3, S4 or R5? There can be little doubt ...
[Read more...]

A function to find the “Penultimax”

September 13, 2012 | inkhorn82

Penulti-what?  Let me explain: Today I had to iteratively go through each row of a donor history dataset and compare a donor’s maximum yearly donation total to the second highest yearly donation total.  In even more concrete terms, for each … Continue reading → [Read more...]

books for review (in CHANCE)

September 13, 2012 | xi'an

Among the books I received for review in CHANCE, here are some neither I nor my “usual suspects” had enough time or interest in to review: R Graphics (second edition) by Paul Murrell Biostatistics: A computing approach by Stewart Anderson Advanced Bayesian methods for medical test accuracy by Lyle Broemeling ... [Read more...]

Word Clouds in R

September 13, 2012 | Mollie

Thanks to the wordcloud package, it's super easy to make a word cloud or tag cloud in R.In this case, the words have been counted already. If you are starting with plain text, you can use the text mining package tm to obtain the counts. Other blog... [Read more...]

Imputation by mean?

September 13, 2012 | Michael kao

Today, I was briefed that when computing the regional aggregates such as those defined by the M49 country standard of the United Nation (http://unstats.un.org/unsd/methods/m49/m49regin.htm) I should use the regional mean to replace missing values.... [Read more...]

Effective Graphs with R

September 13, 2012 | David Smith

Today's guest post is by Naomi Robbins, author of the Effective Graphs blog — ed. I write a blog on effective graphs for Forbes. David Smith invited me to write a guest post here that was a roundup of some of my Forbes posts where R was used. My use of ... [Read more...]

R2MLwiN package

September 13, 2012 | Shige

The new package R2MLwiN package bridges R and MLwinN software for multilevel analysis. From the examples provided, it looks very promising. It will be great if a command line version of MLwiN can be made available under Linux so the package can be usef... [Read more...]

Automatic cleaning of messy text data

September 13, 2012 | Schaun Wheeler

[UPDATE: I just wrapped AspellCheck() in a llply/laply wrapper from Hadley Wickham's `plyr` package, so now it can be run on a vector of texts as well as a single character string, and it now has a default progress bar (set progress = "none" to turn it off). But you ... [Read more...]

BCEA examples

September 13, 2012 | Gianluca Baio

I've prepared a document (which I've put on the website here, together with some scripts at this page) which I think is helpful, if you're trying to work out BCEA. I have never really thought of this, but I believe that when you write an acad... [Read more...]

Kendall’s function for copulas

September 12, 2012 | arthur charpentier

As mentioned in the course on copulas, a nice tool to describe dependence it Kendall's cumulative function. Given a random pair with distribution  , define random variable . Then Kendall's cumulative function is Genest and Rivest (1993) intr... [Read more...]
1 7 8 9 10 11 14

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)