September 2014

Complex Domain Coloring

September 30, 2014 | aschinchon

Why don’t you stop doodling and start writing serious posts in your blog? (Cecilia, my beautiful wife) Choose a function, apply it to a set of complex numbers, paint  the result using the HSV technique and be ready to be impressed because images can be absolutely amazing. You only ... [Read more...]

Implementing an EM Algorithm for Probit Regressions

September 30, 2014 | Rcpp Gallery

Users new to the Rcpp family of functionality are often impressed with the performance gains that can be realized, but struggle to see how to approach their own computational problems. Many of the most impressive performance gains are demonstrated with seemingly advanced statistical methods, advanced C++–related constructs, or both. ...
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Why are we still teaching T-tests?

September 30, 2014 | Joseph Rickert

The following post by Norm Matloff originally appeared on his blog, Mad(Data)Scientist, on September 15th. We rarely republish posts that have appeared on other blogs, however, the questions that Norm raises both with respect to the teaching of statistics, and his assertion that "R's statistical procedures are centered ... [Read more...]

Example 2014.11: Contrasts the basic way for R

September 30, 2014 | Ken Kleinman

As we discuss in section 6.1.4 of the second edition, R and SAS handle categorical variables and their parameterization in models quite differently. SAS treats them on a procedure-by-procedure basis, which leads to some odd differences in capabilities and default parameterizations. For example, in the logistic procedure, the default is effect ...
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Syrian Refugee Settlement Clinic Locations

September 30, 2014 | jlebeau

Previously I posted about the location of refugee settlements and how that had grown in density over time as well as in numbers.  As many NGOs and non-profits work in the area, they are providing much needed assistance to the people living around ... [Read more...]

Running RStudio via Docker in the Cloud

September 30, 2014 | Markus Gesmann

Deploying applications via Docker container is the current talk of town. I have heard about Docker and played around with it a little, but when Dirk Eddelbuettel posted his R and Docker talk last Friday I got really excited and had to have a go myself.... [Read more...]

Rcpp 0.11.3

September 29, 2014 | Thinking inside the box

A new release 0.11.3 of Rcpp is now on the CRAN network for GNU R, and an updated Debian package has been uploaded too. Rcpp has become the most popular way of enhancing GNU R with C++ code. As of today, 273 packages on CRAN depend on Rcpp for making... [Read more...]

Data Manipulation Using dplyr

September 29, 2014 | Vivek Patil

This post is my slidify-based presentation on dplyr, a package that provides tools for data manipulation. The idea for this came from a tutorial created by Kevin Markham on this package. After a link to my first presentation on this based on a dataset used in that tutorial (which is ... [Read more...]

Video introduction to data manipulation with dplyr

September 29, 2014 | David Smith

Hadley Wickham's dplyr package is a great toolkit for getting data ready for analysis in R. If you haven't yet taken the plunge to using dplyr, Kevin Markham has put together a great hands-on video tutorial for his Data School blog, which you can see below. The video covers the ... [Read more...]

A majority victory is not that impossible

September 29, 2014 | Daniel Marcelino

By this time next week, we'll already know the true vote intentions of Brazilians towards the candidates running for president. Not long time ago a runoff was taken as grant, but last polls have been converging on the feeling that Brazilians are about to reward the Workers' Party's government another ... [Read more...]
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