The Price of Fuel: How Bad Could It Get?

April 1, 2015
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The Price of Fuel: How Bad Could It Get?

The cost of fuel in South Africa (and I imagine pretty much everywhere else) is a contentious topic. It varies from month to month and, although it is clearly related to the price of crude oil and the exchange rate, various other forces play an influential role. According to the Department of Energy the majority The post

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Configuring the R BatchJobs package for Torque batch queues

March 31, 2015
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Configuring the R BatchJobs package for Torque batch queues

I was asked recently to look at some R code which performs “embarrassingly parallel” computations (the same function, multiple times, different parameters) and see whether I could modify it...

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Modeling Count Time Series with tscount Package

March 31, 2015
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Modeling Count Time Series with tscount Package

The example below shows how to estimate a simple univariate Poisson time series model with the tscount package. While the model estimation is straightforward and yeilds very similar parameter...

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A new open source data set for anomaly detection

March 31, 2015
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Yahoo Labs has just released an interesting new data set useful for research on detecting anomalies (or outliers) in time series data. There are many contexts in which anomaly detection...

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an example of drawing beast tree using ggtree

March 31, 2015
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an example of drawing beast tree using ggtree

FigTree is designed for viewing beast output as demonstrated by their example data: BEAST output is well supported by ggtree and it's easy to reproduce such a tree view. ggtree...

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More Airline Crashes via the Hadleyverse

March 31, 2015
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I saw a fly-by #rstats mention of more airplane accident data on — of all places — LinkedIn (email) today which took me to a GitHub repo by @philjette....

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Le Monde puzzle [#905]

March 31, 2015
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Le Monde puzzle [#905]

A recursive programming  Le Monde mathematical puzzle: Given n tokens with 10≤n≤25, Alice and Bob play the following game: the first player draws an integer1≤m≤6 at random. This player...

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Fundamentals of R: Free course by General Assembly & DataCamp

March 31, 2015
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Fundamentals of R: Free course by General Assembly & DataCamp

Together with General Assembly, DataCamp created a free set of videos on the fundamentals of R. Discover it now! In a series of short videos, the team behind DataCamp teaches...

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Registration Open for R/Finance 2015!

March 31, 2015
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You can find registration information and agenda details (as they become available) on the conference website.  Or you can go directly to the registration page.  Note that there's an early-bird registration deadl...

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Targeted Learning R Packages for Causal Inference and Machine Learning

March 31, 2015
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Targeted Learning R Packages for Causal Inference and Machine Learning

by Sherri Rose Assistant Professor of Health Care Policy Harvard Medical School Targeted learning methods build machine-learning-based estimators of parameters defined as features of the probability distribution of the...

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Using genomation to analyze methylation profiles from Roadmap epigenomics and ENCODE

March 31, 2015
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Using genomation to analyze methylation profiles from Roadmap epigenomics and ENCODE

The genomation package is a toolkit for annotation and visualization of various genomic data. The package is currently in developmental version of BioC. It allows...

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R / Finance 2015 Open for Registration

March 31, 2015
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The annoucement below just went to the R-SIG-Finance list. More information is as usual at the R / Finance page. Registration for R/Finance 2015 is now open! The conference...

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Another Interactive Map for the Cholera Dataset

March 31, 2015
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Another Interactive Map for the Cholera Dataset

Following my previous post, François (aka @FrancoisKeck) posted a comment mentionning another package I could use to get an interactive map, the rleafmap package. And the heatmap was here...

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Interactive pivot tables with R

March 31, 2015
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Interactive pivot tables with R

I love interactive pivot tables. That is the number one reason why I keep using spreadsheet software. The ability to look at data quickly in lots of different...

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all syntax to download and analyze publicly-available survey microdata confirmed to work on windows, macintosh, and unix systems

March 31, 2015
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the creators of monetdb at centrum wiskunde and informatica generously provided me with a unix shell account to test out each of the scripts in the repository.  much of...

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rPithon vs. rPython

March 30, 2015
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rPithon vs. rPython

Similar to rPython, the rPithon package (http://rpithon.r-forge.r-project.org) allows users to execute Python code from R and exchange the data between Python and R. However, the underlying mechanisms between these...

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Speed test of sequence generation for unbalanced simulation

March 30, 2015
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I have a simulation package that allows for the simulation of regression models including nested data structures. You can see the package on github here: simReg. Over the weekend...

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Improved memory usage and RJSONIO compatibility in jsonlite 0.9.15

March 30, 2015
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Improved memory usage and RJSONIO compatibility in jsonlite 0.9.15

The jsonlite package implements a robust, high performance JSON parser and generator for R, optimized for statistical data and the web....

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MCMskv, Lenzerheide, Jan. 5-7, 2016

March 30, 2015
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MCMskv, Lenzerheide, Jan. 5-7, 2016

Following the highly successful MCMski IV, in Chamonix last year, the BayesComp section of ISBA has decided in favour of a two-year period, which...

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Fastest Growing Software for Scholarly Analytics: Python, R, KNIME…

March 30, 2015
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Fastest Growing Software for Scholarly Analytics: Python, R, KNIME…

In my ongoing quest to “analyze the world of analytics”, I’ve added the following section below to The Popularity of Data Analysis Software: It would be useful to have...

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rud.is » R 2015-03-30 13:32:08

March 30, 2015
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rud.is » R 2015-03-30 13:32:08

Over on The DO Loop, @RickWicklin does a nice job visualizing the causes of airline crashes in SAS using a mosaic plot. More often than not, I find mosaic...

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The most common R error messages

March 30, 2015
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R has something of a reputation for generating, shall we say, obscure error messages like this: Error in model.frame.default(formula = y ~ female + DNC + SE_region + :...

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Mapping Flows in R

March 30, 2015
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Mapping Flows in R

Last year I published the above graphic, which then got

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Data Visualization cheatsheet, plus Spanish translations

March 30, 2015
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Data Visualization cheatsheet, plus Spanish translations

We’ve added a new cheatsheet to our collection. Data Visualization with ggplot2 describes how to build a plot with ggplot2 and the grammar of graphics. You will find helpful...

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Need for Processing Speed: data.table

March 30, 2015
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Need for Processing Speed: data.table

Monday 30 March 2015 - 15:05 The first time I discovered data.table it felt like magic. I was waiting on a process...

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R & Google Maps and R & Robotics (ROS)

R & Google Maps and R & Robotics (ROS)

The next RBelgium meetup will be about R & Google Maps and R & Robotics (ROS). BNOSAC will be hosting the event this time. This is the schedule: • 17h30-18h: open questions •...

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Sampling Distributions and Central Limit Theorem in R

March 29, 2015
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Sampling Distributions and Central Limit Theorem in R

The Central Limit Theorem (CLT), and the concept of the sampling distribution, are critical for understanding why statistical inference works. There are at least a handful of problems that...

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Autoregressive Conditional Poisson Model – I

March 29, 2015
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Autoregressive Conditional Poisson Model – I

Modeling the time series of count outcome is of interest in the operational risk while forecasting the frequency of losses. Below is an example showing how to estimate a...

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intuition beyond a Beta property

March 29, 2015
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intuition beyond a Beta property

A self-study question on X validated exposed an interesting property of the Beta distribution: If x is B(n,m) and y is B(n+½,m) then √xy is B(2n,2m) While this can...

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