Bias in Observational Studies – Sensitivity Analysis with R package episensr

April 18, 2015
By
Bias in Observational Studies – Sensitivity Analysis with R package episensr

When it’s time to interpret the study results from your observational study, you have to estimate if the effect measure you obtained is the truth, if it’s due to bias (systematic error, the effect measure’s precision), or if it’s due to chance (random error, the effect measure’s validity) (Rothman and Greenland, 2008, pp115-134). Every study … Continue reading...

Read more »

Analysing The Rock ‘n’ Roll Madrid Marathon

April 18, 2015
By
Analysing The Rock ‘n’ Roll Madrid Marathon

Nobody’s going to win all the time. On the highway of life you can’t always be in the fast lane (Haruki Murakami, What I Talk About When I Talk...

Read more »

How to convert an R data.tree to JSON

April 18, 2015
By

I have recently published the data.tree R package to CRAN. It provides OO-style tree building, with standard tree traversal methods. Read the vignette about data.tree features if you are...

Read more »

ID3 Classification using data.tree

April 17, 2015
By
ID3 Classification using data.tree

Introduction About this vignette What is ID3? Feature Selection Purity and Entropy Information Gain The ID3 algorithm Pseudo code Implementation in R with the data.tree package Training with data...

Read more »

The Non-parametric Bootstrap as a Bayesian Model

April 17, 2015
By
The Non-parametric Bootstrap as a Bayesian Model

The non-parametric bootstrap was my first love. I was lost in a muddy swamp of zs, ts and ps when I first saw her. Conceptually beautiful, simple to implement,...

Read more »

R 3.2.0 is released (+ using the installr package to upgrade in Windows OS)

April 17, 2015
By
R 3.2.0 is released (+ using the installr package to upgrade in Windows OS)

R 3.2.0 (codename “Full of Ingredients”) was released yesterday. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new features and bug fixes...

Read more »

It’s a Batsman’s World (Cup)

April 17, 2015
By
It’s a Batsman’s World (Cup)

The 2015 Cricket World Cup rewrote the record books in dramatic fashion. Amidst the usual insanity that surrounds this event, there were some amazingly good - and bad - performances. Batting-wise,...

Read more »

The Intersection of “Data Capital” and Advanced Analytics

April 17, 2015
By

We’ve heard about the Three Laws of Data Capital from Paul Sonderegger at Oracle: data comes from activity, data tends to make more data, and platforms tend to...

Read more »

R 3.2.0 released

April 17, 2015
By

The R Core Team announced yesterday that the latest update to R, R 3.2.0 (codename: "Full of Ingredients") is now available. As of this writing the source bundle is...

Read more »

R User Group Meetings this week in the Bay Area and around the world

April 16, 2015
By
R User Group Meetings this week in the Bay Area and around the world

by Joseph Rickert Tracking R user group meetings is a good way to stay informed about what's happening in the R world. On Tuesday the Bay Area useR Group...

Read more »

Now you can start every R tutorial for free @DataCamp

April 16, 2015
By
Now you can start every R tutorial for free @DataCamp

Want to learn more on topics such as R programming, dplyr, data.table, ggvis, and R Markdown? You can now start every DataCamp course for free, and discover how fun it...

Read more »

Statistics journals network

April 16, 2015
By
Statistics journals network

Xian blogged recently on the incoming RSS read paper: Statistical Modelling of Citation Exchange Between Statistics Journals, by Cristiano Varin, Manuela Cattelan and David Firth. Following the last JRSS B read paper by...

Read more »

Knitr with Bio7

April 16, 2015
By

16.04.2015 In Bio7 it is possible to write a documentation in knitr. A simple visual and textual HTML editor (based on JavaFX) and an embedded Latex editor (based on...

Read more »

Python and R: Basic Sampling Problem

April 16, 2015
By

In this post, I would like to share a simple problem about sampling analysis. And I will demonstrate how to solve this using Python and R. The first...

Read more »

Drawing rarefaction curves with custom colours

April 16, 2015
By
Drawing rarefaction curves with custom colours

I was sent an email this week by a vegan user who wanted to draw rarefaction curves using rarecurve() but with different colours for each curve. The solution to...

Read more »

Scraping Web Pages With R

April 15, 2015
By
Scraping Web Pages With R

One of the things I tend to avoid doing in R, partly because there are better tools elsewhere, is screenscraping. With the release of the new rvest package, I...

Read more »

Recommending Recommender Systems When Preferences Are Not Driven By Simple Features

April 15, 2015
By
Recommending Recommender Systems When Preferences Are Not Driven By Simple Features

Why does lifting out a slice make the pizza appear more appealing?We can begin our discussion with the ultimate feature bundle - pizza toppings. Technically, a menu would only...

Read more »

New Packages for Reading Data into R

April 15, 2015
By
New Packages for Reading Data into R

Hadley Wicham has announced two new package for reading external data into R that will likely be of great interest to fisheries scientists. readr — Several new functions that...

Read more »

Using R in Myanmar (and other low-bandwidth environments)

April 15, 2015
By
Using R in Myanmar (and other low-bandwidth environments)

R is already in use in well over 100 cities around the world, and now we can add another to the list: Yangon, Myanmar. Ben Marwick is a trainer...

Read more »

Get data out of excel and into R with readxl

April 15, 2015
By
excel_to_R

I’m pleased to announced that the first version of readxl is now available on CRAN. Readxl makes it easy to get tabular data out of excel. It: Supports both...

Read more »

R and package masking – a real life example

April 15, 2015
By
R and package masking – a real life example

From original post @http://analyticsblog.mecglobal.it/e

Read more »

The Problem with Propensity Scores

April 14, 2015
By
The Problem with Propensity Scores

Are Propensity Scores Useful? Effect estimation for treatments using observation data isn't always straight forward. For example,...

Read more »

Bernouilli, Montmort and Waldegrave

April 14, 2015
By
Bernouilli, Montmort and Waldegrave

In the last issue of Statistical Science, David Belhouse   and Nicolas Fillion published an accounting of a discussion between Pierre Rémond de Montmort, Nicolaus...

Read more »

Interactive time series with dygraphs

April 14, 2015
By
Interactive time series with dygraphs

The dygraphs package is an R interface to the dygraphs JavaScript charting library. It provides rich facilities for charting time-series data in R, including: Automatically plots xts time-series objects...

Read more »

ModSpace as a SAS DD Replacement

April 14, 2015
By
ModSpace as a SAS DD Replacement

ModSpace is our web-based collaborative platform used by groups of analysts to store, share and discover models, data and scripts in a version controlled environment. We were approached by...

Read more »

RStudio v0.99 Preview: Tools for Rcpp

April 14, 2015
By
RStudio v0.99 Preview: Tools for Rcpp

Over the past several years the Rcpp package has become an indispensable tool for creating high-performance R code. Its power and ease of use have made C++ a natural second...

Read more »

Beautiful plots while simulating loss in two-part procrustes problem

April 14, 2015
By
Beautiful plots while simulating loss in two-part procrustes problem

Today I was working on a two-part procrustes problem and wanted to find out why my minimization algorithm sometimes does not converge properly or renders unexpected results. The loss...

Read more »

RPowerLabs: Electric power system virtual laboratories online

April 14, 2015
By
RPowerLabs: Electric power system virtual laboratories online

by Ben Ubah Founder, RPowerLabs No disregard to R's colleagues, R is pioneering the creation of online virtual electric power system laboratories via RPowerLABS. RPowerLABS is a project, with...

Read more »

Project Tycho, ggplot2 and the shameless stealing of blog ideas

April 14, 2015
By
Project Tycho, ggplot2 and the shameless stealing of blog ideas

Last week, Mick Watson posted a terrific article on using R to recreate the visualizations in this WSJ article on the impact of vaccination. Someone beat me to the...

Read more »