I am still working with @3wen on visualizations of the North Pole. So far, it was not that difficult to generate maps, but we started to have problems with the ice region in the Arctic. More precisely, it was complicated to compute the area of this region (even if we ... [Read more...]

This post is mostly an attempt to familiarize myself with Rmarkdown, jekyll, and github. I recently posted an R package (rfunctions), which contains some functions I wrote (or modified) that make my life a little easier. I’ll go through some examples in R to highlight the various functions included. ... [Read more...]

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Andy Kirk (@visualisingdata) & Lynn Cherny (@arnicas) tweeted about the Guardian Word Count service/archive site, lamenting the lack of visualizations: Want to know num of words written in each day's Guardian paper by section + approx reading time? http://t.co/wP4W1EzUsx via @bengoldacre— Andy Kirk (@visualisingdata) March 15, 2014 This ... [Read more...]

This post is just a test Big Text Markdown seems pretty cool. I’d like to see if I can post a few R examples later [Read more...]

In R, function may not be as special as it is in other programming languages; it is regarded as one of the many types and can be passed as an argument to some other function. The way we deal with other objects such list and data.frame definitely applies to ... [Read more...]

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In June 2013, the conflict between opposition and government forces around the Syrian city of Aleppo had intensified. Rockets struck residential districts, and car-bombs exploded near key facilities. Many people died. But as is common in conflict areas, the reports of the number of dead varied by the source of the ... [Read more...]

Inspired by this article i thought about gather here all multimedia resources that i know to learn use R. Today […] The post MOOCs and courses to learn R appeared first on Flavio Barros . [Read more...]

On January 27, 2014 Raring Ringtail (13.04) reached end of life. I have been slowly removing the Raring repositories from the RRutter PPA, c2d4u PPA, and CRAN. I think I have most of that cleaned up, so there is no longer support for R in Raring from... [Read more...]

I saw this chart in a presentation and thought I could make it better and interactive.  Here is a short article on the iteration process.  Click on the screenshot below or here for the full post. Note: these are not my views and this is not financial... [Read more...]

Happy π day everybody! I wanted to write some simple code (included below) to the test parallelization capabilities of my  new cluster. So, in honor of  π day, I decided to check for evidence that π is a normal number. A … Continue reading → [Read more...]

The question one should always asked him/herself when using technical indicators is what would be an objective criteria to select indicators parameters (e.g., why using a 14 days RSI rather than 15 or 20 days?). Genetic algorithms (GA) are well suited tools to answer that question. In this post I’ll ... [Read more...]

A new minor release 0.11.1 of Rcpp is now on the CRAN network for GNU R; binaries for Debian have also been uploaded. The release fixes a number of bugs that have come up since the 0.11.0 release in January, but also brings some extensions. See t... [Read more...]

After a colleague of mine requested an illustration of the aggregation technique that was part of an introduction to spatial data in R, I decided to revisit aggregation. The first article I posted here on the subject used data from London; this one is slightly different, using Twitter data aggregated ... [Read more...]

I've added a new functionality to my highlightHTML package. This package post-processes HTML files and injects CSS and adds tags to create some further customization (for example highlight cells of a HTML table). This is most useful when writing a document using markdown and converting it into a HTML document ... [Read more...]

Oftentimes, we obtain a long or a wide table from a certain data source, and it may be the only format we can get. For example, some financial databases provide daily tick data for all stocks in a financial market. The data table may be arranged in a long format ... [Read more...]

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Bayesian Search Theory The US had a pretty big problem on their hands in 1966. Two planes had hit each other during a in-flight refueling and crashed. Normally, this would be an unfortunate thing and terrible for the families of those involved in the crash but otherwise fairly limited in importance. ... [Read more...]

I am listing some useful R resources. I start with the following post on (free) R Books from R-bloggers.com. An R "Meta" Book by Joseph Rickerthttps://www.r-bloggers.com/an-r-meta-book/ This page lists some e-books or e-materials for various topics in statistics ranging from basis concepts of statistics to ... [Read more...]