The Downside of Rankings-Based Strategies
This post will demonstrate a downside to rankings-based strategies, particularly when using data of a questionable quality (which, unless one … Continue reading →
February 2015
Collaborative Computing with distcomp
by Joseph Rickert Distcomp, a new R package available on GitHub from a group of Stanford researchers has the potential to significantly advance the practice of collaborative computing with large data sets distributed over separate sites that may be unwilling to explicitly share data. The fundamental idea is to be ... [Read more...]
Fuzzy String Matching – a survival skill to tackle unstructured information
“The amount of information available in the internet grows every day” thank you captain Obvious! by now even my grandma is aware of that!. Actually, the internet has increasingly become the first address for... [Read more...]
R: How to Layout and Design an Infographic
As promised from my recent article, here's my tutorial on how to layout and design an infographic in R. This article will serve as a template for more infographic design that I plan to share on future posts. Hence, we will go through the following sect...
Generating ANOVA-like table from GLMM using parametric bootstrap
This article may also be found on RPubs: http://rpubs.com/hughes/63269 In the list of worst to best way to test for effect in GLMM the list on http://glmm.wikidot.com/faq state that parametric bootstrapping is among the best options. PBmodcomp in the pbkrtest package implement such ... [Read more...]
Adobe Sitecatalyst API and R: integrate reports with the SAINT classification file
From original post @ http://analyticsblog.mecglobal.it/ [...] [Read more...]
Mapping religious adherence in the US with CartoDB
Before coming to TCU, I worked as a data analyst for the Church Pension Group, which manages the retirement funds and provides other financial services for the Episcopal Church. I was part of a small research group that completed both internal and public-facing studies using the company’s data. You ... [Read more...]
RMySQL version 0.10.2: Full SSL Support
RMySQL version 0.10.2 has appeared on CRAN. This is a maintenance release to streamline the build process on various platforms. Most importantly, the Windows/OSX binary packages from CRAN are now built with full SSL support. On Linux, the configure script has been updated a bit to automatically find the mysql ...
Talking about R, Data Science and Microsoft on theCUBE
It was a pleasure to appear live on theCUBE last week while attending the Strata conference. In my interview with Jeff Kelly and John Furrier, I talked about the rising popularity of R, the applications of data science, and the recent announcement of Microsoft acquiring Revolution Analytics. I also gushed ... [Read more...]
Max Kuhn’s Talk on Predictive Modeling
Max Kuhn, Director of Nonclinical Statistics of Pfizer and also the author of Applied Predictive Modeling joined us on February 17, 2015 and shared his experience with Data Mining […] [Read more...]
Announcing: Introduction to Data Science video course
Win-Vector LLC’s Nina Zumel and John Mount are proud to announce their new data science video course Introduction to Data Science is now available on Udemy. We designed the course as an introduction to an advanced topic. The course description is: Use the R Programming Language to execute data ... [Read more...]
Using Hadoop Streaming API to perform a word count job in R and C++
by Marek Gagolewski, Maciej Bartoszuk, Anna Cena, and Jan Lasek (Rexamine). Introduction In a recent blog post we explained how we managed to set up a working Hadoop environment on a few CentOS7 machines. To test the installation, let’s play…Read more › [Read more...]
How Big Is The Vatican City?
Dici che il fiume trova la via al mare e come il fiume giungerai a me (Miss Sarajevo, U2) One way to calculate approximately the area of some place is to circumscribe it into a polygon of which you know its area. After that, generate coordinates inside the polygon and ...
Visualizing Clusters
Consider the following dataset, with (only) ten points x=c(.4,.55,.65,.9,.1,.35,.5,.15,.2,.85) y=c(.85,.95,.8,.87,.5,.55,.5,.2,.1,.3) plot(x,y,pch=19,cex=2) We want to get – say – two clusters. Or more specifically, two sets of observations, each of them sharing some similarities. Since the number of observations is rather small, it is actually possible to ... [Read more...]
Monitoring progress of a foreach parallel job
by Andrie de Vries R has strong support for parallel programming, both in base R and additional CRAN packages. For example, we have previously written about foreach and parallel programming in the articles Tutorial: Parallel programming with foreach and Intro to Parallel Random Number Generation with RevoScaleR. The foreach package ... [Read more...]
Rare snowmelt estimation (GB)
I read Hough and Hollis’ 1997 paper recently which uses Met Office synoptic stations to estimate a magnitude – recurrence relationship for snowmelt in the UK. i.e. how often do we get how… Continue reading →
Minimal examples help
The other day I got stuck working with a huge data set using data.table in R. It took me a little while to realise that I had to produce a minimal reproducible example to actually understand why I got stuck in the first place. I know, this is the ... [Read more...]
Strata 2015: Keynote roundup
I spent last week at the Strata 2015 Conference in San José, California. As always, Strata made for a wonderful conference to catch up on the latest developments on big data and data science, and to connect with colleagues and friends old and new. Having been to every Strata conference since ... [Read more...]
How to learn R: A flow chart
I often find myself giving people suggestions about how to learn R, so I decided to put together a flow chart. This is geared toward typical psychology or cognitive science researchers planning to do basic data analysis in R. This is how to get started...
Make prettier documents by reusing chunks in RMarkdown
No revelations here, just a little R tip for generating more readable documents. There are times when I want to show code in a document, but I don’t want it to be the first thing that people see. What I want to see first is the output from that ...
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