Introduction to recommender systems

August 20, 2018
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Introduction to recommender systems

Why build a recommender system? The most wonderful and most frustrating characteristic of the Internet is its excessive supply of content. As a result, many of today’s commercial giants are not content providers, but content distributors. The success of companies such as Amazon, Netflix, YouTube and Spotify relies on their ability to effectively deliver relevant and novel content to...

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Reproducible research and a repository of artifacts, a RFC

August 20, 2018
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This  work is still in progres. I think, however, it can already resonate with some people in the community. The communication I am hopeful for should lead to a...

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Statistics Sunday: Using Text Analysis to Become a Better Writer

August 19, 2018
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Statistics Sunday: Using Text Analysis to Become a Better Writer

Using Text Analysis to Become a Better Writer We all have words we love to use, and that we perhaps use too much. As an example: I have...

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Clustered Covariances in sandwich 2.5-0

August 19, 2018
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Clustered Covariances in sandwich 2.5-0

Version 2.5-0 of the R package 'sandwich' is available from CRAN now with enhanced object-oriented clustered covariances (for lm, glm, survreg,...

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Ordered Probit Model and Price Movements of High-Frequency Trades

August 19, 2018
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Ordered Probit Model and Price Movements of High-Frequency Trades

The analysis of high frequency stock transactions has played an important role in the algorithmic trading and the result can be used to monitor stock movements and to develop...

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More Practical Data Science with R Book News

August 19, 2018
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Some more Practical Data Science with R news. Practical Data Science with R is the book we wish we had when we started in data science. Practical Data Science...

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Mapping the Prevalence of Alzheimer Disease Mortality in the USA

August 18, 2018
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Mapping the Prevalence of Alzheimer Disease Mortality in the USA

In comparison with other statistical software (e.g., SAS, STATA, and SPSS), R is the best for data visualization. Therefore, in all posts I have written for DataScience+ I take...

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R:case4base – code profiling with base R

August 18, 2018
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R:case4base – code profiling with base R

Introduction In this summertime post in the case4base series, we will look at useful tools in base R, which let us profile our code without any extra packages needed to...

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approximative Laplace

August 17, 2018
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approximative Laplace

I came across this question on X validated that wondered about one of our examples in Monte Carlo Statistical Methods. We have included a section on Laplace approximations in...

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Topics and Categories in the Russian Troll Tweets

August 17, 2018
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Topics and Categories in the Russian Troll Tweets

Topics and Categories in the Russian Troll Tweets I decided to return to the analysis I conducted for the IRA tweets dataset. (You can read up on...

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A Review of James Picerno’s Quantitative Investment Portfolio Analytics in R

August 17, 2018
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This is a review of James Picerno’s Quantitative Investment Portfolio Analytics in R. Overall, it’s about as fantastic a book … Continue reading →

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How to Create Sankey Diagrams From Tables (Data Frames) Using R

August 17, 2018
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Step 1: Create a Tidy data frame The very first step in creating visualizations is to get the data in a useful format. In the...

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RcppArmadillo 0.9.100.5.0

August 17, 2018
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RcppArmadillo 0.9.100.5.0

A new RcppArmadillo release 0.9.100.5.0, based on the new Armadillo release 9.100.5 from earlier today, is now on CRAN and in Debian. It once again follows our (and Conrad's)...

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An R package to create NEWS.md files

August 17, 2018
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An R package to create NEWS.md files

A while back, I started to create an R package that would help me and my collegues at STATWORX with our daily work. After writing the DESCRIPTION file, I...

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Many reports from 1 RMarkdown file

August 17, 2018
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I was at the EdinbR talk this week by the RStudio community lead – Curtis Kephart. It was really interesting, but I disagree with his suggestion to point and...

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RcppArmadillo 0.9.100.5.0

August 16, 2018
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RcppArmadillo 0.9.100.5.0

A new RcppArmadillo release 0.9.100.5.0, based on the new Armadillo release 9.100.5 from earlier today, is now on CRAN and in Debian. It once again follows our (and Conrad's)...

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Make R speak

August 16, 2018
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Make R speak

Every wanted to make R talk to you? Now you can, with the mscstts package by John Muschelli. It provides an interface to the Microsoft Cognitive Services Text-to-Speech API...

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Relative risk ratios and odds ratios by @ellis2013nz

August 16, 2018
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Relative risk ratios and odds ratios by @ellis2013nz

This post tries to explain the difference between odds ratios and relative risk ratios; and how just a few letters in the code fitting a generalized linear model mean...

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Great post!

August 16, 2018
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Great post!

Great post!I wanted to mention that although many previous studies have used the area under receiver operating characteristic curve (auROC) statistic to benchmark the precision, it misleads evaluators when...

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Updates to the sergeant (Apache Drill connector) Package & a look at Apache Drill 1.14.0 release

August 16, 2018
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Updates to the sergeant (Apache Drill connector) Package & a look at Apache Drill 1.14.0 release

Apache Drill 1.14.0 was recently released, bringing with it many new features and a temporary incompatibility with the current rev of the MapR ODBC drivers. The Drill community expects...

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Slides from R/Pharma

August 16, 2018
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Slides from R/Pharma

...

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Bio7 2.9 Released

August 16, 2018
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Bio7 2.9 Released

16.08.2018 A new release of Bio7 is available. The new Bio7 2.9 release comes with a plethora of new R features and bugfixes. Release Notes: General: Based on Eclipse...

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Linear programming in R

August 16, 2018
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Linear programming in R

Linear programming is a technique to solve optimization problems whose constraints and outcome are represented by linear relationships. Simply put, linear programming allows to solve problems of the following kind: Maximize/minimize...

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Remaking ‘Luminance-gradient-dependent lightness illusion’ with R

August 16, 2018
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Remaking ‘Luminance-gradient-dependent lightness illusion’ with R

A blogpost inspired by a tweet and a YouTube video. ‘Luminance-gradient-dependent lightness illusion’ In the last days, I’ve stumbled upon this tweet: A demo of lightness perception pic.twitter.com/BSVpgcuIw1 —...

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How to capitalize on a priori contrasts in linear (mixed) models: A tutorial

August 16, 2018
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We wrote a short tutorial on contast coding, covering the common contrast coding scenarios, among them: treatment, helmert, anova, sum, and sliding (successive differences) contrasts.  The target audience is...

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Dealing with The Problem of Multicollinearity in R

August 15, 2018
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Dealing with The Problem of Multicollinearity in R

Imagine a situation where you are asked to predict the tourism revenue for a country, let’s say India. In this case, your output or dependent or response variable will...

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Basic Generalized Linear Modeling – Part 3: Exercises

August 15, 2018
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Basic Generalized Linear Modeling – Part 3: Exercises

In this exercise, we will continue to solve problems from the last exercise about GLM here. Therefore, the exercise number will start at 9. Please make sure you read...

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Beyond Basic R – Mapping

August 15, 2018
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Beyond Basic R – Mapping

Introduction There are many different R packages for dealing with spatial data. The main distinctions between them involve the types of data they work with — raster or vector —...

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“Where to bird” geostats in R

August 15, 2018
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“Where to bird” geostats in R

I just came across a nice little post on acquiring and visualizing geodata in R using the Max Planck Institute of Ornithology as an example. It’s by the rOpenSci...

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