September 2014

Complex Domain Coloring

September 30, 2014 | 0 Comments

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 | 0 Comments

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. ...
[Read more...]

Install R in Android, via GNURoot -no root required!

September 30, 2014 | 0 Comments

Playing with my tablet some time ago, I wondered if installing R could be possible. You know, a small android device “to the power of R”… After searching on Google from time to time, I came across some interesting possibilities: … Sigue leyendo → [Read more...]

Generating Hurricanes with a Markov Spatial Process

September 30, 2014 | 0 Comments

The National Hurricane Center (NHC) collects datasets with all  storms in North Atlantic, the North Atlantic Hurricane Database (HURDAT). For all sorms, we have the location of the storm, every six jours (at midnight, six a.m., noon and six p.m.). Note that we have also the date, the ... [Read more...]

Why are we still teaching T-tests?

September 30, 2014 | 0 Comments

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...]

Building a DGA Classifier: Part 1, Data Preparation

September 30, 2014 | 0 Comments

This will be a three-part blog series on building a DGA classifier and will be split into three logical phases of building a classifier: 1) Data preparation (this) 2) Feature engineering and 3) Model selection. And before I get too far into this, I want to give a huge thank you to Click ... [Read more...]

Example 2014.11: Contrasts the basic way for R

September 30, 2014 | 0 Comments

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 ...
[Read more...]

Syrian Refugee Settlement Clinic Locations

September 30, 2014 | 0 Comments

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 | 0 Comments

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 | 0 Comments

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 | 0 Comments

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...]

Data management with ShinyApps.io

September 29, 2014 | 0 Comments

Some of the most innovative Shiny apps share data across user sessions. Some apps share the results of one session to use in future sessions, others track user characteristics over time and make them available as part of the app. This level of sophistication creates tricky design choices when you ...
[Read more...]

Video introduction to data manipulation with dplyr

September 29, 2014 | 0 Comments

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...]

TURF Analysis: A Bad Answer to the Wrong Question

September 29, 2014 | 0 Comments

Now that R has a package performing Total Unduplicated Reach and Frequency (TURF) Analysis, it might be a good time to issue a warning to all R users. DON'T DO IT!The technique itself is straight out of media buying from the 1950s. Given some number of... [Read more...]
1 2 3 13

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)