Sequence of shopping carts in-depth analysis with R – Sequence of events

January 28, 2015
By
Sequence of shopping carts in-depth analysis with R – Sequence of events

This is the third part of the sequence of shopping carts in-depth analysis. We processed initial data in the required format, did the exploratory analysis and started the in-depth analysis in the first post. Finally, we used cluster analysis for creating customer segments in the second post. As I mentioned in the first post, the sequence can... Read More »

Read more »

rClr 0.7-3 released

January 27, 2015
By
rClr 0.7-3 released

Version 0.7-3 of rClr (source code also on GitHub), a package to access arbitrary .NET code seamlessly in-process, has just been released. The package was first introduced a year...

Read more »

What a Gas! The Falling Price of Oil and Ontario Gasoline Prices

January 27, 2015
By
What a Gas! The Falling Price of Oil and Ontario Gasoline Prices

IntroductionIn case you've been living under a rock, there's been a lot of chatter in the financial world late about the price of oil going down. Way,...

Read more »

Check your return types when modeling in R

January 27, 2015
By
Check your return types when modeling in R

Just a warning: double check your return types in R, especially when using different modeling packages. We consider ourselves pretty familiar with R. We have years of experience, many...

Read more »

Parallel Programming with GPUs and R

January 27, 2015
By

by Norman Matloff You've heard that graphics processing units — GPUs — can bring big increases in computational speed. While GPUs cannot speed up work in every application, the...

Read more »

googleVis version 0.5.8 released

January 27, 2015
By
googleVis version 0.5.8 released

We released googleVis version 0.5.8 on CRAN last week. The update is a maintenance release for the forthcoming release of R 3.2.0. Screen shot of some of the Google...

Read more »

Why you should learn R first for data science

January 26, 2015
By
Why you should learn R first for data science

Over and over, when talking with people who are starting to learn data science, there’s a frustration that comes up: I don’t know which programming language to start with.”...

Read more »

RWE npower Forecasting Challenge

January 26, 2015
By
RWE npower Forecasting Challenge

Lately I have been involved in organising forecasting competition for undergraduate students. The obvious goal is to find someone with forecasting power who would potentially be interested in internship...

Read more »

the density that did not exist…

January 26, 2015
By
the density that did not exist…

On Cross Validated, I had a rather extended discussion with a user about a probability density as I thought it could be decomposed in two manageable conditionals and simulated...

Read more »

PACKAGE: matrixStats 0.13.1 – Methods that Apply to Rows and Columns of a Matrix (and Vectors)

January 26, 2015
By
PACKAGE: matrixStats 0.13.1 – Methods that Apply to Rows and Columns of a Matrix (and Vectors)

A new release 0.13.1 of matrixStats is now on CRAN. The source code is available on GitHub. What does it do? The matrixStats package provides highly...

Read more »

Microsoft acquires Revolution Analytics – news roundup

January 26, 2015
By

There was a lot of news coverage on Friday and over the weekend about the news that Microsoft will acquire Revolution Analytics. Here are some links to just a...

Read more »

Presidential Approval and Applause

January 26, 2015
By
Presidential Approval and Applause

Some may have seen a twitter post about spurious correlations that myself and others mentioned on twitter.  Basically this was a joke about how correlation can be found in many...

Read more »

xkcd on P-values

January 26, 2015
By
xkcd on P-values

From the "statistician humour" department, today's xkcd cartoon will ring a bell for anyone who's ever published (or read!) a scientific article including a P-value for a statistical test:...

Read more »

Wine for Breakfast: Consumption Occasion as the Unit of Analysis

January 26, 2015
By
Wine for Breakfast: Consumption Occasion as the Unit of Analysis

If the thought of a nice Chianti with that breakfast croissant is not that appealing, then I have made by point: occasion shapes consumption. Our tastes have been fashioned...

Read more »

5 new R jobs (2015-01-26)

January 26, 2015
By
5 new R jobs (2015-01-26)

This is the bimonthly R Jobs post (for 2015-01-26), based on the R-bloggers’ sister website: R-users.com. If you are an employer who is looking to hire people from the R community, please visit this link...

Read more »

Docker and Enabling Analytic Workflows

January 26, 2015
By

By Mark Sellors – Senior IT Consultant, UK It’s been a few months now since I presented on the ways in which Mango are using Docker at EARL 2014...

Read more »

One of My Favorite R Oddities: dump()

January 26, 2015
By
One of My Favorite R Oddities:  dump()

R is full of things that make "real programmers" (I dislike this term) turn their noses up in disgust. One of my favorites is the dump() function. It is...odd....

Read more »

stringdist 0.9: exercise all your cores

January 26, 2015
By
stringdist 0.9: exercise all your cores

The latest release of the stringdist package for approximate text matching has two performance-enhancing novelties. First of all, encoding conversion got a lot faster since this is now done...

Read more »

Comparing the contribution of NBA draft picks

January 25, 2015
By
Comparing the contribution of NBA draft picks

When it comes to the NBA draft, experts tend to argue about a number of things: at which position will a player be selected? what is the best draft class ever? etc…...

Read more »

World Ocean Atlas changes

January 25, 2015
By
World Ocean Atlas changes

Introduction The ocedata R package has a dataset named levitus, which stores sea-surface temperature and salinity. Today, the development version of ocedata (available at github) was updated from the...

Read more »

RcppArmadillo 0.4.600.4.0

January 25, 2015
By

Conrad put up a maintenance release 4.600.4 of Armadillo a few days ago. As in the past, we tested this with number of pre-releases and test builds...

Read more »

Tokyo-based R Meetup TokyoR #45

January 25, 2015
By
Tokyo-based R Meetup TokyoR #45

Last week, I attended a Tokyo-based Statistical Software R meetup named “TokyoR #45” held on Jan 17 at VOYAGE GROUP office in Shibuya, Tokyo. Almost all presentations were given...

Read more »

Odds, odds ratio, language and intuition

January 25, 2015
By

I was reading a statistics book the other day. I am at the beginning. In this section I read '(we) report results as odds ratios, which is more intuitive'....

Read more »

Building [Security] Dashboards w/R & Shiny + shinydashboard

January 24, 2015
By
Building [Security] Dashboards w/R & Shiny + shinydashboard

Jay & I cover dashboards in Chapter 10 of Data-Driven Security (the book) but have barely mentioned them on the blog. That’s about to change with a new...

Read more »

A New Harry Long Strategy and A Couple of New PerfA Functions

January 24, 2015
By
A New Harry Long Strategy and A Couple of New PerfA Functions

So, Harry Long came out with a new strategy on SeekingAlpha involving some usual mix of SPXL (3x leveraged SPY), … Continue reading →

Read more »

Rcpp 0.11.4

January 24, 2015
By

A new release 0.11.4 of Rcpp is now on the CRAN network for GNU R, and an updated Debian package will be uploaded in due...

Read more »

RcppGSL 0.2.4

January 24, 2015
By

A new version of RcppGSL is now on CRAN. This package provides an interface from R to the GNU GSL using our Rcpp package. This follows on the heels...

Read more »

RcppAnnoy 0.0.5

January 24, 2015
By

A new version of RcppAnnoy is now on CRAN. RcppAnnoy wraps the small, fast, and lightweight C++ template header library Annoy written by Erik Bernhardsson for use at...

Read more »

GPU Tutorial, with R Interfacing

January 24, 2015
By
GPU Tutorial, with R Interfacing

You’ve heard that graphics processing units — GPUs — can bring big increases in computational speed.  While GPUs cannot speed up work in every application, the fact is that...

Read more »