January 2018

Hierarchical compartmental reserving models

January 8, 2018 | R on mages' blog

Today, I will sketch out ideas from the Hierarchical Compartmental Models for Loss Reserving paper by Jake Morris, which was published in the summer of 2016 (Morris (2016)). Jake’s model is inspired by PK/PD models (pharmacokinetic/pharmacodynamic models) used in the pharmaceutical industry to describe the time course of effect ...
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Learn your way around the R ecosystem

January 8, 2018 | David Smith

One of the most powerful things about R is the ecosystem that has emerged around it. In addition to the R language itself and the many packages that extend it, you have a network of users, developers, governance bodies, software vendors and service providers that provide resources in technical information ... [Read more...]

Bio7 2.7 Retina-Display Fix for MacOSX

January 8, 2018 | R – Bio7 Website

08.01.2018 I recently discovered on a high dpi display (Retina-Display) enabled 13’’ notebook that the latest release of Bio7 for MacOSX is not displayed in high dpi but in a lower resolution which makes text and icons blurry (scaled) and unnecessary strains the eyes when editing R scripts with the R editor. ... [Read more...]

Holt-Winters with a Quantile Loss Function

January 8, 2018 | arthur charpentier

Exponential Smoothing is an old technique, but it can perform extremely well on real time series, as discussed in Hyndman, Koehler, Ord & Snyder (2008)), when Gardner (2005) appeared, many believed that exponential smoothing should be disregarded because it was either a special case of ARIMA modeling or an ad hoc procedure with ... [Read more...]

Dr. Evil meets the robotstxt package

January 7, 2018 | Paul Oldham's Analytics Blog

I am fairly new to webscraping in R using rvest and one question is whether a site gives permission for scraping. This information is often contained in the robots.txt file on a website. So, I’m briefly going to explore the ROpenSci robotstxt package by Peter Meissner. robotstxt provides ... [Read more...]

The Trouble with Tibbles

January 7, 2018 | R on The Jumping Rivers Blog

What are tibbles? Precursors Tribblemaking Tibbles vs Data Frames Disadvantages To summarise.. Let’s get something straight, there isn’t really any trouble with tibbles. I’m hoping you’ve noticed this is a play on 1967 Star Trek episode, “The Trouble with Tribbles”. I’ve recently got myself a job ...
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The Trouble with Tibbles

January 7, 2018 | R on The Jumping Rivers Blog

What are tibbles? Precursors Tribblemaking Tibbles vs Data Frames Disadvantages To summarise.. Let’s get something straight, there isn’t really any trouble with tibbles. I’m hoping you’ve noticed this is a play on 1967 Star Trek episode, “The Trouble with Tribbles”. I’ve recently got myself a job ... [Read more...]

Written R/exams around the World

January 7, 2018 | R/exams

How to internationalize exams2nops() by adding support for new natural languages in written R/exams (that can be automatically scanned and evaluated). Idea In addition to completely customizable PDF output, R/exams provides a standardized format called “NOPS” for written exams with multiple-choice (and/or single-choice) exercises that can ... [Read more...]

Anscombe’s Quartet: 1980’s Edition

January 7, 2018 | Method Matters

In this post, I’ll describe a fun visualization of Anscombe’s quartet I whipped up recently. If you aren’t familiar with Anscombe’s quartet, here’s a brief description from its Wikipedia entry: “Anscombe’s quartet comprises four datasets...
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Anscombe’s Quartet: 1980’s Edition

January 7, 2018 | Method Matters

In this post, I'll describe a fun visualization of Anscombe's quartet I whipped up recently.If you aren't familiar with Anscombe's quartet, here's a brief description from its Wikipedia entry: "Anscombe's quartet comprises four datasets that have nearly identical simple descriptive statistics, yet appear very different when graphed. Each dataset ...
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My Journey Into Data Science

January 7, 2018 | rosebudanwuri

Quite a number of people have asked me about my switch from Chemical Engineering to Data Science. How did I do it? When did I do it? Why did I do it? I felt today (January 6, 2018) was a befitting day to answer these questions as it marks the third year ...
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Discontinuing maintenance of jug

January 7, 2018 | FishyOperations

I’m starting off 2018 with dropping my involvement with jug. The reason for this being that I simply cannot find the time or interest anymore to maintain the code. All of the open-source efforts that I started always had to do with a concrete need t... [Read more...]

Undemocratic Democracies

January 7, 2018 | diffuseprior

I’ve always thought that it was ironic that most countries with the word “Democratic” in their name are exceptionally un-democratic in reality. So I was very interested in the following post on Reddit this week showing exactly this (https://www.reddit.com/r/dataisbeautiful/comments/7nkyek/countries_with_the_...
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Downloading UK property prices from Zoopla in R

January 6, 2018 | Eryk Walczak

Zoopla allows a limited access to its API providing the latest property prices and area indices. I created a package in R that allows querying this database. See the GitHub documentation or zooplaR’s page for the latest info. You can easily get prices in the last couple of months ...
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Interpreting Logistic Models

January 6, 2018 | Rstats on pi: predict/infer

The purpose of this blog post is to review the derivation of the logit estimator and the interpretation of model estimates. Logit models are commonly used in statistics to test hypotheses related to binary outcomes, and the logistic classifier is commonly used as a pedagogic tool in machine learning courses ...
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