R posts in other languages
Having finally popped the stack on computing prime numbers with R in Part II and Part III, we are now in a position to discuss their relevance for computational scalability.
My original intent was to show how poor partitioning of a workload can defeat the linear scalability expected when full parallelism is otherwise attainable, i.e., zero...
Having finally popped the stack on computing prime numbers with R in Part II and Part III, we are now in a position to discuss their relevance for computational scalability.
My original intent was to show how poor partitioning of a workload can defeat the linear scalability expected when full parallelism is otherwise attainable, i.e., zero...
Hacker News user post polls from time to time - the following code constructs a bar chart based upon the responses to a recent poll on the stated religious affiliation of Hacker news users (parsed straight from the site). The chart above is as of...
The R community is unique as programming communities go. Many users of R come from academia and have a relatively extensive mathematical background. The R community has developed in relative isolation from some other areas of programming th...
MCMCglmm does not produce more than one chain. So the way to check convergence is to run the model twice, each with different starting values, then conduct the diagnostic with:gelman.diag(m1$Sol, m2$Sol)
I have been looking for this type of package for several days, and luckily found it today. Unquestionable R is powerful, however, R programming is unfriendly as far as I concern, mainly due to the lack of format shortcut, which makes the R codes rathe...
library(maps)states <- data.frame(map("state", plot=FALSE))plot(states, type = "l", col = "navy", axes = FALSE, xlab = "", ylab = "")title("Happy 4th of July", col.main = "red")
Europe Data set:> eurodist Athens Barcelona Brussels Calais Cherbourg Cologne CopenhagenBarcelona 3313
There are a lot of great references on the web on how to levarage LaTeX for reporting and presentations (beamer), but as someone who is completely new to R and reproducible research, I was having a pretty hard time figuring out simply what to do (what tools, where do you edit, etc.). Eclipse as a 
Update (07.07.10): The function in this post has a more mature version in the “arm” package. See at the end of this post for more details. * * * * Imagine you want to give a presentation or report of your latest findings running some sort of regression analysis. How would you do it? This was exactly the question...
Political polling is a big industry these days, especially here in the US, and both mainstream news outlets and many of the bigger political blogs commission their own polls to measure (for example) the popularity of a sitting or candidate politician or policy. In the last week though, a very public spat has erupted between the left-leaning political blog...
The LaTeX beamer package can be used to create appealing presentations for many applications. A working knowledge of LaTeX is required but once the initial learning curve and transition is made from a visual word processor to a markup based approach the benefits are worth the initial investment of time. Title Pages In a previous post we
Objective I’ll admit it: my résumé doesn’t stand out. I’ve had some great internships, but also a tendency to work for companies that aren’t (yet!) household names. And though I’m doing fine academically, it’s not well enough to stand out … Continue reading →
LATITUDE + LONGITUDE + OVERPLOTTING FIX = MAPS Decision Science News is always learning stuff from colleague, physicist, mathlete, and all-around computer whiz Jake Hofman. Today, it was a quick and clean way to make nice maps in R without using any map packages: just plot the latitude and longitude of your data points (e.g.
Registration for the worldwide R user conference, useR! 2010, closed on June 20. But it seems like a few folks weren't aware of the early deadline, and missed out on registering. Never fear! Due to overwhelming demand, registration has re-opened until midnight on July 4. You'll need to hurry -- there are only 30 spots left -- so get...
We hereby call for the submission of original papers for a Special Issue of the Journal of Statistical Software (JSS - http://www.jstatsoft.org)Magnetic Resonance Imaging in R planned for Summer 2011. The deadline for submission is October 31, 2...
We hereby call for the submission of original papers for a Special Issue of the Journal of Statistical Software (JSS - http://www.jstatsoft.org)Magnetic Resonance Imaging in R planned for Summer 2011. The deadline for submission is October 31, 2...
Peter Huber referred to “the rawness of raw data”, a kind of data we would not expect to find in a textbook. The book of Fahrmeir and Tutz on multivariate modelling refers to the visual impairment data from Liang et al., 1992 in table 3.12: Nothing wrong here at first sight; but how would you
Imagine you finish a dirty coding project and want to present to your boss who is not in a good mood (may not be occasionally), how are you going to start? Show him your hundreads of lines code, point to the lines, explain what the arguments and outputs are? No, it is not a smart way since you are...
Here's a ditty to search the cran R packages by descriptioncranSearch = function(q=''){ library(XML) u<-'http://cran.r-project.org/web/packages/' d<-readHTMLTable(u) d]$V1 lib.names <-...
This week I had the opportunity the trek up north to Silicon Valley to attend Yahoo’s Hadoop Summit 2010. I love Silicon Valley. The few times I’ve been there the weather was perfect (often warmer than LA), little to no traffic, no road rage and people overall seem friendly and happy. Not to mention there are so many trees...
About prize baring contests Competition with prizes are an amazing thing. If you are not sure of that, I urge you to listened to Peter Diamandis talk about his experience with the X prize (start listening at minute 11:40): At short – prizes can give up to 1 to 50 ratio of return on investment of the people giving...
The latest edition of the R Journal is now available. This issue includes in-depth articles on the packages IsoGene, glmmBUGS, cshapes, tmvtnorm, neuralnet, glmperm and exactci/exact2x2, plus an example of reproducible research in R. There's also a review of the book A Beginner's Guide to R. The complete edition is available for download in PDF format at the link...
It is fairly straightforward to set the margins of a graph in R by calling the par() function with the mar (for margin!) argument. For example, par(mar=c(5.1,4.1,4.1,2.1) sets the bottom, left, top and right margins respectively of the plot region in number of lines of text. Another way is by specifying the margins in inches
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
