11 new R jobs (from R-users.com ; 2015-08-04)

August 3, 2015
By
11 new R jobs (from R-users.com ; 2015-08-04)

This is the bimonthly post (for 2015-08-04) for new R Jobs from R-users.com. Employers: visit this link to post a new R job to the R community (it’s free and quick). Job seekers: please follow the links below to learn more and apply for your job of interest (or visit previous R jobs posts). Full-Time Data Scientist AWF Leading On Line company – Posted by Ortal Katsva Netanya Center District, Israel...

Read more »

Wikipedia and the Fashion Weeks: A Look at Usage Patterns

August 3, 2015
By
Wikipedia and the Fashion Weeks: A Look at Usage Patterns

Unlike many of the entries on Wikipedia relating to statistics or computer science, fashion related topics have not not been thoroughly documented. For example, the entries on Martin Margiela and Rei...

Read more »

Multivariate Techniques in Python: EcoPy Alpha Launch!

August 3, 2015
By
Multivariate Techniques in Python: EcoPy Alpha Launch!

I’m announcing the alpha launch of EcoPy: Ecological Data Analysis in Python. EcoPy is a Python module that contains a number of  techniques (PCA, CA, CCorA, nMDS, MDS, RDA,...

Read more »

Sensemaking in R: A Plenitude of Models Makes for Good Storytelling

August 3, 2015
By
Sensemaking in R: A Plenitude of Models Makes for Good Storytelling

"Sensemaking is a motivated, continuous effort to understand connections (which can be among people, places, and events) in order to anticipate their trajectories and act effectively."- Gary Klein, Brian...

Read more »

Feature Engineering versus Feature Extraction: Game On!

August 3, 2015
By
Feature Engineering versus Feature Extraction: Game On!

"Feature engineering" is a fancy term for making sure that your predictors are encoded in the model in a manner that makes it as easy as possible for the...

Read more »

Going Bananas #2: A Needle In A Haystack

August 3, 2015
By
Going Bananas #2: A Needle In A Haystack

Now I’m gonna tell my momma that I’m a traveller, I’m gonna follow the sun (The Sun, Parov Stelar) Inspired by this book I read recently, I decided to...

Read more »

Ternary Interpolation / Smoothing

August 3, 2015
By
Ternary Interpolation / Smoothing

For a long time, people have been sending me requests for a suitable smoothing / contouring / interpolation geometry be made available via ggtern, over and above the Kernel...

Read more »

Producing a Control Chart in R – An Application in Analytical Chemistry

Producing a Control Chart in R – An Application in Analytical Chemistry

Introduction Many processes in chemistry, especially in synthesis, require attaining a certain target value for a property of interest.  For example, when synthesizing drug capsules that contain a medicine, a...

Read more »

Interview with a Data Scientist (Hadley Wickham)

August 2, 2015
By
Interview with a Data Scientist (Hadley Wickham)

Originally posted on Models are illuminating and wrong:I recently interviewed Hadley Wickham the creator of Ggplot2 and a famous R Stats person. He works for RStudio and his...

Read more »

Survival Analysis – 1

August 2, 2015
By

I recently was looking for methods to apply to time-to-event data and started exploring Survival Analysis Models. In this post, I'm exploring basic KM estimator which is a nonparametric...

Read more »

Two New R Packages – qrencoder & passwordrandom

August 2, 2015
By
Two New R Packages – qrencoder & passwordrandom

Believe it or not, there are two questions on @StackOverflowR about how to make QR codes in R. I personally think QR codes are kinda hokey, but...

Read more »

Playing with leafletR

August 2, 2015
By

Coming back from a bicycle ride in Tarn, I wanted to have a look at the trip. This gave me the opportunity to learn how to use the R...

Read more »

Seattle’s Fremont Bridge Bicyclists Again in the News

August 2, 2015
By
Seattle’s Fremont Bridge Bicyclists Again in the News

Back in 2013, David Smith had done analysis of bicycle trips across Seattle’s Fremont bridge. More recently, Jake Vanderplas (creator of Python’s very popular Scikit-learn package) wrote a nice...

Read more »

[ggtree] annotate phylogenetic tree with local images

August 1, 2015
By
[ggtree] annotate phylogenetic tree with local images

In ggtree, we provide a function annotation_image for annotating phylogenetic tree with images. To demonstrate the usage, I created a tree view from a random tree as shown below:

Read more »

Streamgraphs in R

July 31, 2015
By
Streamgraphs in R

It's not easy to visualize a quantity that varies over time and which is composed of more than two subsegments. Take, for example, this stacked bar chart of religious...

Read more »

Rendering LaTeX Math Equations in GitHub Markdown

July 31, 2015
By
Rendering LaTeX Math Equations in GitHub Markdown

The Problem: GitHub README.md won't render LaTeX I have many times wondered about getting LaTeX math to render in a README file on GitHub. Apparently, many others ( 1,...

Read more »

Building a user interface for spatstat

July 30, 2015
By
Building a user interface for spatstat

Contents Introduction Get and run it! Roadmap Introduction RStudio developed shiny, an R package that, quoting from their website, “makes it super simple for R users...

Read more »

15 Questions All R Users Have About Plots

July 30, 2015
By
15 Questions All R Users Have About Plots

R allows you to create different plot types, ranging from the basic graph types like density plots, dot plots, bar charts, line charts, pie charts, boxplots and scatter plots,...

Read more »

MRAN’s Packages Spotlight

July 30, 2015
By
MRAN’s Packages Spotlight

by Joseph Rickert New R packages just keep coming. The following plot, constructed with information from the monthly files on Dirk Eddelbuettel's CRANberries site, shows a plot of the...

Read more »

The little mixed model that could, but shouldn’t be used to score surgical performance

July 30, 2015
By
The little mixed model that could, but shouldn’t be used to score surgical performance

The Surgeon Scorecard Two weeks ago, the world of medical journalism was rocked by the public release of ProPublica’s Surgeon Scorecard. In this project ProPublica “calculated death and complication...

Read more »

Empirical bias analysis of random effects predictions in linear and logistic mixed model regression

July 30, 2015
By
Empirical bias analysis of random effects predictions in linear and logistic mixed model regression

In the first technical post in this series, I conducted a numerical investigation of the biasedness of random effect predictions in generalized linear mixed models (GLMM), such as the ones...

Read more »

#rstats Make arrays into vectors before running table

July 29, 2015
By
#rstats Make arrays into vectors before running table

Setup of Problem While working with nifti objects from the oro.nifti, I tried to table the values of the image. The table took a long time to compute. I...

Read more »

R Oddities: Strings in DataFrames

July 29, 2015
By
R Oddities:  Strings in DataFrames

Have you ever read a file into R and then encountered strange problems filtering and sorting because the strings were converted to factors?  For...

Read more »

But I Don’t Want to Be a Statistician!

July 29, 2015
By
But I Don’t Want to Be a Statistician!

"For a long time I have thought I was a statistician.... But as I have watched mathematical statistics evolve, I have had cause to wonder and to doubt.... All...

Read more »

Mapping the past and the future with Leaflet

July 29, 2015
By
Mapping the past and the future with Leaflet

I have been working on mapping things for a while and I must say that I really like the Leaflet package from Rstudio. It makes it very easy and...

Read more »

Player Value Gap Assessment

July 29, 2015
By
Player Value Gap Assessment

Looking at fantasy football projections we have a group of experts providing their views on how a player will do during the football season. We have collected projections from...

Read more »

Predict Social Network Influence with R and H2O Ensemble Learning

July 29, 2015
By
Predict Social Network Influence with R and H2O Ensemble Learning

What is H2O? H2O is an awesome machine learning framework. It is really great for data scientists and business analysts “who need scalable and fast machine learning”. H2O is...

Read more »

Hockey Elbow and Other Response Time Injuries

July 29, 2015
By
Hockey Elbow and Other Response Time Injuries

You've heard of tennis elbow. Well, there's a non-sports, performance injury that I like to call hockey elbow. An example of such an "injury" is shown in Figure...

Read more »

The most popular programming languages on StackOverflow

July 29, 2015
By
The most popular programming languages on StackOverflow

by Andrie de Vries Last week, IEEE Spectrum said R rised to #6 in Top Programming languages. They use a weighted methodology of 12 factors to compute their score....

Read more »