As I go about cleaning and merging data sets with R I often end up creating and using simple functions over and over. When this happens, I stick them in the DataCombine package. This makes it easier for me to remember how to do an operation and others can possibly benefit from simplified and (hopefully) more intuitive code....
New package: jsonlite. A smart(er) JSON encoder/decoder.
This week we released a new package on CRAN: jsonlite. This package is a fork of RJSONIO by Duncan Temple Lang...
Incidental Parameters Problem with Binary Response Data and Unobserved Individual Effects
It is a well known problem that in some models as the number of observations becomes large, econometric estimators fail to converge on consistent estimators. The leading case of...
24 Days of R: Day 5
Some time back, I started a project on GitHub wherein I would explore the efficacy of financial literacy efforts in the area where I live. This is done with...
Check if a Variable Exists in R
If you use attach, it is easy to tell if a variable exists. You can simply use exists to check:>attach(df)>exists("varName") TRUEHowever, if you don't use attach (and I find you generally...
A conversation with Robert Scoble
I had the pleasure of visiting technology guru Robert Scoble at Rackspace Labs a few weeks ago. We had a great conversation about the Big Data revolution, and how...
New version of image.scale function
Below is an updated version of the image.scale function. In the old version, one had to constantly use additional arguments to suppress axes and their labels. The new version...
My first… plot (.ly): beautiful plots with Plotly
Dear R-enthusiastic, I discovered Plotly some days ago, and I was fascinated by it. What is Plotly? Plotly is a service for creating and sharing data visualizations that also...
My current R projects at the end of 2013
I have been meaning to write a long post explaining each of the major R projects I am currently working on, but I can't seem to find the time...
24 Days of R: Day 4
So my first attempt to sort out the career of Michael Caine via parsing of HTML data was a wash. I'm going to try this again, using Wikipedia. They've...
Unobserved Effects With Panel Data
It is common for researchers to be concerned about unobserved effects being correlated with observed explanatory variables.For instance, if we were curious about the effect of meditation on emotional...
Averaged Input Assumptions and Momentum
Today I want to share another interesting idea contributed by Pierre Chretien. Pierre suggested using Averaged Input Assumptions and Momentum to create reasonably quiet strategy. The averaging techniques are...
2013 was a good year for R User Group Meetings
by Joseph Rickert R user groups are thriving. By our count of events listed on Revolution Analytics' Community Calendar, there were about 441 face-to-face R meetups worldwide in 2013;...
a public list of R freelancers
tl,dr: If you want to be contacted for freelance R work, edit this list https://github.com/isomorphisms/hire-an-r-programmer/blob/master/README.md. Background/Problem: I was looking for a list of R-programming freelancers and realised...
Introduction to R for Quantitative Finance
An introductory book on Quantitative Finance and R I co-authored with some learned faculty members of the Corvinus University of Budapest (Michael Puhle, Edina Berlinger, Péter Csóka, Dániel...
Catching errors in R and trying something else
I recently encountered some functionality in R which most of you might already know. Nevertheless, I want to share it here, because it might come in handy for those...
R-bloggers: an example of how interest networks propel viral events
A guest post by Jeff Hemsley, who has co-authored with Karine Nahon a new book titled Going Viral. ————————- In Going Viral (Polity Press, 2013) we explore the topic of virality,...
Using R to replicate common SPSS multiple regression output
(This article was first published on Jeromy Anglim's Blog: Psychology and Statistics, and kindly contributed to R-bloggers) The following post replicates some of the standard output you might get...
Complete list of Coursera courses using R ranked by “popularity”
Coursera – an online education startup – has rapidly expanded its curriculum of statistics and data analysis courses. Today, there are already 33 modules directly linked to the field,...
14 Analytics Predictions for 2014
In a live webinar today hosted by Alteryx, five industry experts shared 14 analytics predictions for 2014. The panel included Paul Ross (Alteryx), Charles Zedlewski (Cloudera), Rick Schultz (Alteryx),...
Sample size and power for rare events
We have written a bit on sample size for common events. We would like to extend this analysis to rare events. In web marketing and a lot of other...
Maximizing Return from Every Item in the Marketing Research Questionnaire
Consumers will not complete long questionnaires, so marketing research must get the most it can from every item. In this post, we look into the toolbox of R packages...
Shiny Server 0.4
Today, we’re excited to announce the release of Shiny Server version 0.4 as well as the availability of a beta version of Shiny Server Professional Edition. Shiny Server is a...
New Version of RStudio (v0.98)
We’re pleased to announce that the final version of RStudio v0.98 is available for download now. Highlights of the new release include: An interactive debugger for R that is tightly integrated...
Setting Axis Limits on ggplot Charts
I’ve been doodling some chart in R/ggplot using geom_text() to generate a labelled scatterplot. The chart actually builds up several layers using different datasets, so it’s not obvious how...
digest 0.6.4
digest version 0.6.4 is now on CRAN and in Debian. This is a pure maintenance release which should help with a build issue affecting users on Solaris. CRANberries provides the usual summary of changes...
Preview of book Data Mining Applications with R
An edited book titled Data Mining Applications with R will be on market soon, which features 15 real-word applications on data mining with R. A preview of the book...
R in Insurance Conference, London, 14 July 2014
Following the very positive feedback that Andreas and I have received from delegates of the first R in Insurance conference in July of this year, we...
R: how not to use savehistory() and source()
Admitting to stupidity is part of the learning process. So in the interests of public education, here’s something stupid that I did today. You’re working in the R console....
