R Photo

April 10, 2019
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R Photo

A good friend is now a professor at the University of Auckland and knew to photograph and send us this. Thanks!!!

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Lost In [SQL] Translation: Charting d[b]plyr Mapped SQL Function Support Across All Backends

April 10, 2019
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Lost In [SQL] Translation: Charting d[b]plyr Mapped SQL Function Support Across All Backends

Like more posts than I care to admit, this one starts innocently enough with a tweet by @gshotwell: Is there a reference document somewhere of which dplyr commands work on various database backends? #rstats — Gordon Shotwell (@gshotwell) April 9, 2019 Since I use at least 4 different dplyr backends every week, this same question... Continue reading →

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Separating the Signal from the Noise: Robust Statistics for Pedestrians

April 10, 2019
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Separating the Signal from the Noise: Robust Statistics for Pedestrians

One of the problems of navigating an autonomous car through a city is to extract robust signals in the face of all the noise that is present in the different sensors. Just taking something like an arithmetic mean of all the data points could possibly end in a catastrophe: if a part of a wall … Continue reading "Separating...

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Announcement: Register by Friday for Free R Training Sessions

April 9, 2019
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I run this blog because I want to help you learn to be a better R user! But in order to do that, I need to know more about where you are in your journey and the kinds of problems you're facing. So, I'm excited to announce that over the next two weeks ...

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The evolution of my academic career as seen through posters and talks thanks to hugo academic 4.1

April 9, 2019
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The evolution of my academic career as seen through posters and talks thanks to hugo academic 4.1

The hugo-academic theme which powers my website is active and frequently updated. I don’t update my website that frequently anymore, but I recently found about many of their changes when I made the CDSB website. We are delighted to share with you our new webpage at https://t.co/rNuiRlNixV with both English and Spanish supportEstamos encantados de compartirles nuestra nueva página web...

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Visualising Model Response with easyalluvial

April 9, 2019
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Visualising Model Response with easyalluvial

In this tutorial I want to show how you can use alluvial plots to visualise model response in up to 4 dimensions. easyalluvial generates an artificial data space using fixed values for unplotted variables or uses the partial dependence plotting method. It is model agnostic but offers some convenient wrappers for caret models. Introduction Taking a peek When building machine learning...

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R Studio Shortcuts and Tips

April 9, 2019
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R Studio Shortcuts and Tips

How can you work faster in R Studio? Do you really want to know? In this article, I would like to share with you some of my favorite productivity features of R Studio along with their respective shortcuts. As well I will provide information about some other tools and techniques that are useful. I also prepared Article R Studio Shortcuts...

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Testing numeric variables for NA/NaN/Inf

April 9, 2019
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In R, a numeric variable is either a number (like 0, 42, or -3.14), or one of 4 special values: NA, NaN, Inf or -Inf. It can be hard to remember how the is.x functions treat each of the special … Continue reading →

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Garmonbozia: Using R to look at Garmin CSV data

April 9, 2019
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Garmonbozia: Using R to look at Garmin CSV data

Garmin Connect has a number of plots built in, but to take a deeper dive into all your fitness data, you need to export a CSV and fire up R. This post is a quick guide to some possibilities for running data.  There’s a few things that I wanted to look at. For example, how

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Register by 14th April! R Trainings in Hamburg

April 9, 2019
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Register by 14th April! R Trainings in Hamburg

„Introduction to R“ and „Introduction to Machine Learning with R“ in Hamburg! Ensure your participation in our popular eoda courses until April 14th and become an R-expert in May. What…

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Easily Built And Share Custom R Menu Scripts With Bio7

April 9, 2019
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09.04.2019 Bio7 can be extended with R packages, Eclipse plugins and ImageJ plugins. Another very easy option to extend the Bio7 Graphical User Interface with R actions are dynamic menus which can be used, e.g., for personalized workflows or repeating tasks. The provision of new menus and nested menus is simple and can be arranged

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The Ultimate Opinionated Guide to Base R Date Format Functions

April 8, 2019
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The Ultimate Opinionated Guide to Base R Date Format Functions

When I was first learning R, working with dates was one of the hardest and most time consuming tasks I dealt with. There are so many things to learn! What do I do with as.POSIXct(), as.POSIXlt(), strftime(), strptime(), format(), and as.Date()? R date formats were confusing, and it seemed no matter what I did I was always running into...

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Learning and Teaching R | Get to the Plot

April 8, 2019
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Learning and Teaching R | Get to the Plot

As an experienced R user, I have seen numerous social media posts and perhaps even a few stackexchange requests over the years asking the question, “how do I learn R?”. This is a great question. A related one is, “how do I teach or coach R?” To the would-be student, I ask, “What attracted you to R in the...

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DS Applied to Philosophy: Text Mining David Hume (Pt. 1)

April 8, 2019
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David Hume – poster boy of the Scottish Enlightenment, contemporary of Adam Smith, and famous essayist – was embarrassingly nowhere to be found on my radar. The knowledge gap became...

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Community Call – Security for R

Community Call – Security for R

“Security” can be a daunting, scary, and (frankly) quite often a very boring topic. BUT!, we promise that this Community Call on May 7th will be informative, engaging, and enlightening (or, at least not boring)! Applying security best practices is essential not only for developers or sensitive data storage but also for the everyday R user installing R packages, contributing...

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Fast sampling support in dqrng

April 8, 2019
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Fast sampling support in dqrng

About half a year ago I wrote about dqsample providing a bias free alternative to base::sample(). Meanwhile this is mostly of historic interest, since the upcomming R release 3.6.0 will see an updated sampling algorithm. However, some of the techniques used in dqsample are now part of dqrng. Of course, the sampling method is still

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Practical Data Science with R Book Update

April 8, 2019
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Practical Data Science with R Book Update

A good friend shared with us a great picture of Practical Data Science with R, 1st Edition hanging out in Cambridge at the MIT Press Bookstore. This is as good an excuse as any to share a book update. Nina Zumel and I (John Mount) are busy revising chapters 10 and 11 of Practical Data … Continue reading Practical...

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Analyse Site Structure and Internal Linking Structure with igraph

April 8, 2019
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Analyse Site Structure and Internal Linking Structure with igraph

The post Analyse Site Structure and Internal Linking Structure with igraph appeared first on The Lucid Manager. This article discusses how to analyse site structure and internal linking structure of a Wordpress website using the iGraph package in R. The post Analyse Site Structure and Internal Linking Structure with igraph appeared first on The Lucid Manager.

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Bayes vs. the Invaders! Part Two: Abnormal Distributions

April 8, 2019
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Bayes vs. the Invaders! Part Two: Abnormal Distributions

Crossing the Line This post continues our series on developing statistical models to explore the arcane relationship between UFO sightings and population. The previous post is available here: Bayes vs. the Invaders! Part One: The 37th Parallel. The simple linear model developed in the previous post is far from satisfying....

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R Trainings in Hamburg – Register by 14th April!

April 8, 2019
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R Trainings in Hamburg – Register by 14th April!

„Introduction to R“ and „Introduction to Machine Learning with R“ in Hamburg! Ensure your participation in our popular courses until April 14th and become an R-expert in May. What you…

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A Permutation Test Regression Example

April 8, 2019
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A Permutation Test Regression Example

In a post last week I talked a bit about Permutation (Randomization) tests, and how they differ from the (classical parametric) testing procedure that we generally use in econometrics. I'm going to assume that you've read that post. (There may be a snap quiz at some point!) I promised that I'd provide a regression-based example. After all, the two examples that...

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How to Filter in R: A Detailed Introduction to the dplyr Filter Function

April 7, 2019
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Data wrangling. It's the process of getting your raw data transformed into a format that's easier to work with for analysis. It's not the sexiest or the most exciting work. In our dreams, all datasets come to us perfectly formatted and ready for all kinds of sophisticated analysis! In real life, not so much. It's estimated that as much...

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Many ways to do the same thing: linear regression

April 7, 2019
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One feature of R (could be positive, could be negative) is that there are many ways to do the same thing. In this post, I list out the different ways we can get certain results from a linear regression model. … Continue reading →

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Face Recognition with OpenCV

April 7, 2019
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CategoriesProgramming Tags Machine Learning OpenCV R Programming OpenCV is a library of programming functions mainly aimed at real-time computer vision. Originally developed by Intel, it was later supported by Willow Garage then Itseez. The library is cross-platform and free for use under the open-source BSD license. Before starting you can read my article on face detection which will make this code more Related Post Why...

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On Meeting Data Journalists

April 7, 2019
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On Meeting Data Journalists

“I’d rather do data than date”. I overheard this while eavesdropping on a conversation among three female data journalists while waiting for an elevator at the IRE-CAR (Investigative Reporters and Editors - Computer-Assisted Reporting) conference last month. I would like to think the remark was overloaded with hyperbole, but maybe not. Most of the attendees as this conference were...

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Rblpapi 0.3.10: B-PIPE support and other updates

April 7, 2019
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A new version of Rblpapi arrived at CRAN today as version 0.3.10. It regroups several sets of changes (see below). The most notable addition is an extension to use B-PIPE for high-performance bulk data access (in case you are provisioned for it) cont...

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A Limited-but-Functional Couchbase Free Text Search & Retrieval Un-package; or, “How I Abused Couchbase & R to Perform Bulk IP Whois Full-text Searches” (a Cobbler’s Tale)

April 7, 2019
By
A Limited-but-Functional Couchbase Free Text Search & Retrieval Un-package; or, “How I Abused Couchbase & R to Perform Bulk IP Whois Full-text Searches” (a Cobbler’s Tale)

Researching “the internet” (i.e. $DAYJOB) means having to deal with a ton of “unique” (I’m being kind) data formats. This is ultimately a tale of how I performed full-text searches across one of them. It all started off innocently enough. This past week I need to be able to do full-text searches across metadata about... Continue reading →

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How many downloads does my package have?

April 7, 2019
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How many downloads does my package have?

Everyone that authors an R package is curious about how many users download it. As far as I know there’s still no way to get information on all the downloads, from all the R mirrors. Here I’m using package cranlogs, which only gives information on the downloads from the R Studio mirror. It also does … Continue reading How...

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How to install R on Mac, Ubuntu and Windows

April 6, 2019
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How to install R on Mac, Ubuntu and Windows

Original post published outside my blog on May 17th, 2018. I decided to edit the videos with kdenlive again and create both a new post and video. Motivation This is a beginner guide that is designed to save yourself a headache and valuable time if you decide to install R yourself. I am a professor and I don’t like to spend one...

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