June 2012

Getting numpy data into R

June 30, 2012 | Thinking inside the box

The other day, I found myself confronted with a large number of large files. Which were presented in (gzip-)compressed ascii format---which R reads directly via gzfile() connections---as well as (compressed) numpy files. The numpy can be read very ... [Read more...]

Fun with the googleVis Package for R

June 30, 2012 | rbresearch

Using packages such as ggplot and lattice can produce some great charts and visualization, but googleVis is tough to beat for interactive charts to share on the web. Click on the image below to open up the html page. This was all done in R! I will warn you that ... [Read more...]

R is fun

June 30, 2012 | Orval

As mentioned in Universal portfolio, part 6, the wealth reported in Table 8.4 of Universal Portfolios could not be reproduced.  An other observation is that the random weight vectors reported in Table 8.4 are shown in descending lex... [Read more...]

Coefficient Plots in R

June 30, 2012 | Carlisle Rainey

One popular trend in presenting results is the "coefficient plot," an alternative to the table of regression coefficients. I am seeing this a little more often in political science research and have received a few requests for code, so I … Contin... [Read more...]

Simple and heuristic optimization

June 29, 2012 | arthur charpentier

This week, at the Rmetrics conference, there has been an interesting discussion about heuristic optimization. The starting point was simple: in complex optimization problems (here we mean with a lot of local maxima, for instance), we do not ne... [Read more...]

igraph and SNA: an amateur’s dabbling

June 29, 2012 | tylerrinker

I’ve been playing with the igraph package a bit lately (see previous post HERE) and wanted to approach a problem I once visited in the past. The basic gist of the problem is this: Students in a class are asked … Continue reading → [Read more...]

SYTYCD — where are these terrific dancers come from?

June 29, 2012 | Tony

It’s Saturday midnight and I’m already sleepy. However, after several hours, I finally got this google geographic map embedded in my post. Aha!!! This is about 20 finalists from the 9th season of So You Think You Can Dance. I count the states … Continue reading → [Read more...]

igraph and structured text exploration

June 29, 2012 | tylerrinker

I am in the slow process of developing a package to bridge structured text formats (i.e. classroom transcripts)  with the tons of great R packages that visualize and analyze quantitative data (If you care to play with a rough build … Continue reading → [Read more...]

Trying for a baby? Here’s how long it might take.

June 29, 2012 | David Smith

Wanting to start a family the natural way? For a healthy 45-year-old woman, you may be in for a five-year wait. That's the conclusion of Richie Cotton, a UK-based data scientist, who discovered when he and his girlfriend wanted to start a family that statistics on how long it takes ... [Read more...]

Horizon Plot Already Available

June 29, 2012 | klr

When I wrote Cubism Horizon Charts in R, I should have known that horizon plot functionality already exists in R http://rgm2.lab.nig.ac.jp/RGM2/func.php?rd_id=latticeExtra:horizonplot and in this case in one of my already favorite packages latticeExtra...
[Read more...]

Bayesian credible intervals in the mainstream medical literature

June 29, 2012 | BioStatMatt

I have sometimes heard complaints from collaborators that it will be impossible to have their work published in the mainstream literature unless a p-value is reported. This post is to report yet another counterexample that was recently published; a meta-analysis for the odds of perioperative bleeding complications in patients taking ... [Read more...]

Decline Effect in Linguistics?

June 29, 2012 | andrew

Josef Fruehwald writes: In the past few years, the empirical foundations of the social sciences, especially Psychology, have been coming under increased scrutiny and criticism. For example, there was the New Yorker piece from 2010 called “The Truth Wears Off” about the “decline effect,” or how the effect size of a ... [Read more...]

The inner workings of R objects

June 29, 2012 | aghaynes

R is an object oriented language. You provide a name and R supplies that name with various properties. In the simplest case, you can assign a number to a name. This will only have a few attributes, such as its class, length etc: i [Read more...]

Rcpp 0.9.13

June 29, 2012 | Thinking inside the box

The bug-fix in version 0.9.12 of Rcpp turned out to be incomplete, so a new version 0.9.13 is now on CRAN and will get to Debian shortly. The Rcpp::Enviroment constructor is now properly fixed (using the global environment as a default value). As ... [Read more...]

Solving mastermind with R

June 29, 2012 | Bogumił Kamiński

In my last post I have shown a solution to classical sorting problem in R. So I thought that this time it would be nice to generate a strategy for playing Mastermind using R.It was shown by D.E. Knuth that Mastermind code can be bro... [Read more...]

impacTwit : How big is your work on twitter?

June 29, 2012 | Ted Hart

There’s a great Tom Waits song from the album “Mule Variations” called “Big in Japan”. The beauty of saying you’re big in Japan is that no one can ever really verify the statement (or at least that was more true in 1999). You might assert “my work is big ... [Read more...]
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