May 2012

Where’s Waldo? Image Analysis in R

May 17, 2012 | David Smith

R user Arthur Charpentier attempts to use the raster library and R functions to find Waldo in a "Where's Waldo" image: Sadly, it turned out that Waldo was a bit too tricky to spot using these techniques. But Arthur did have more success identifying the US flag in a shot ... [Read more...]

Orbitz: R has become the data-mining tool of choice

May 17, 2012 | David Smith

Sameer Chopra, vice president of Advanced Analytics at Orbitz Worldwide, wrote recently in Analytics magazine about the changing landscape of processes, software and systems for statistical modelers. In a section on "Big Data and Open Source Analytics", Chopra lays out the reasons why the R language "has become the data-mining ... [Read more...]

Github Follower Graph with R

May 17, 2012 | C

Graph a github user's followers (and follower's followers).Each programming language tends to develop its own idiomatic set of data structures.  In R, data frames are often the structure of choice.  JSON (a subset of Javascript) has emerged a... [Read more...]

Excel Import into R without rJava

May 17, 2012 | Lee Pang

In my ongoing quest to webappify various R scripts I discovered that rApache cannot load any R packages that depend on rJava.  For several of the scripts that I've written that grab data out of MS Excel files, and therein use the xlsx package, thi... [Read more...]

More Bixi Data Visualization

May 17, 2012 | Corey Chivers

I mentioned in a previous post that our team at the recent Hack/Reduce hackathon had some fun with a data set which consisted of Bixi station states at minute level temporal resolution. In addition to pulling out and plotting the flux at each station on an hourly basis, we ...
[Read more...]

Please Learn to Read

May 17, 2012 | C

There has been a lot of chatter during the past week on HN generated by with Jeff Atwood's "Please don't learn to code".  Actual posts included:Please don't learn to code (www.codinghorror.com) Please Don't Become Anything, Especially Not A P... [Read more...]

R’s increasing popularity. Should we care?

May 17, 2012 | Luis

Some people will say ‘you have to learn R if you want to get a job doing statistics/data science’. I say bullshit, you have to learn statistics and learn to work in a variety of languages if you want to … Continue reading → [Read more...]

Exponential decay models

May 17, 2012 | Pat

All models are wrong, some models are more wrong than others. The streetlight model Exponential decay models are quite common.  But why? One reason a model might be popular is that it contains a reasonable approximation to the mechanism that generates the data.  That is seriously unlikely in this case. ... [Read more...]

Getting Started with R Markdown, knitr, and Rstudio 0.96

May 16, 2012 | Jeromy Anglim

This post examines the features of R Markdown using knitr in Rstudio 0.96. This combination of tools provides an exciting improvement in usability for reproducible analysis. Specifically, this post (1) discusses getting started with R Markdown and knitr in Rstudio 0.96; (2) provides a basic example of producing console output and plots using R ... [Read more...]

garch() uncertainty

May 16, 2012 | xi'an

As part of an on-going paper with Kerrie Mengersen and Pierre Pudlo, we are using a GARCH(1,1) model as a target. Thus, the model is of the form which is a somehow puzzling object: the latent (variance) part is deterministic and can be reconstructed exactly given the series and the ... [Read more...]

Update: Parameters as Population Quantities

May 16, 2012 | BioStatMatt

Some time ago, I had an ineloquent and less-than-cordial online discussion with a commenter on this site, partially about how statisticians define the term "parameter". This post is just to quote a relevant passage from "Bootstrap Methods and Their Application", by Davison and Hinkley (1997), that better articulates a point I ... [Read more...]

RProtoBuf 0.2.4

May 16, 2012 | Thinking inside the box

A new release 0.2.4 of RProtoBuf is now on CRAN. RProtoBuf provides GNU R bindings for the Google Protobuf data encoding library used and released by Google. This release once again contains a number of patches kindly contributed by Murray Stokely... [Read more...]
1 5 6 7 8 9 15

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)