February 2020

“Clearing the Confusion” series

February 6, 2020 | matloff

In recent weeks, I’ve posted three tutorials with Clearing the Confusion titles, all in my regtools GitHub repo. Topics have been unbalanced classification data; k-fold cross validation; and scaling in PCA. Comments welcome! [Read more...]

Le Monde puzzle [#1130]

February 6, 2020 | xi'an

A two-player game as Le weekly Monde current mathematical puzzle: Abishag and Caleb fill in alternance a row of N boxes in a row by picking one then two then three &tc. consecutive boxes. When a player is unable to find enough consecutive boxes, the player has lost. Who is ...

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R Shiny – Exploring Global Plastic Pollution

February 6, 2020 | Fred (Lefan) Cheng

R shiny | Project Code | Linkedin | Github | Presentations | Email: [email protected] Introduction Click here to check my R shiny. “The global plastic production has mushroomed over the past 70 years. In 1950 the world produced only 2 million tonnes per year. Since then, annual production has increased by nearly 200-fold, reaching 381 million tonnes ...

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Prying “.R” Script Files Away from Xcode (et al) on macOS

February 6, 2020 | hrbrmstr

As the maintainer of RSwitch — and developer of my own (for personal use) macOS, iOS, watchOS, iPadOS and tvOS apps — I need the full Apple Xcode install around (more R-focused macOS folk can get away with just the command-line tools being installed). As an Apple Developer who insanely runs the ... [Read more...]

Function to download biotic interaction datasets

February 6, 2020 | Frederico Mestre

I work in ecology, biogeography, etc… Biotic interactions (interactions between species) and its repercussions on species distributions is my main research interest. As such, I had, at some point, to download datasets on species interactions. I wanted to be able to produce a uniform (more or less, not as much ... [Read more...]

How to use bootstraplib’s Live Theme Previewer to customize Shiny apps?

February 6, 2020 | AbdulMajedRaja RS

One of the announcements of RStudio conf 2020 that caught my eyes is a brand new package {bootstraplib} - https://github.com/rstudio/bootstraplib/ . It’s another open-source contribution from RStudio (a PBC). {bootstraplib} basically provides tools for theming shiny and rmarkdown from R via Bootstrap (3 or 4) Sass. If you’re ...

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New Data Scientist Stickers

February 5, 2020 | John Mount

We have a new data scientist sticker! If you see Nina or John at a conference/MeetUp, please ask us for a sticker!

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Introduction to the forecastLM package

February 5, 2020 | Rami Krispin

I am pleased to announce a new R package - forecastLM. The package, as the name implies, provides applications for forecasting regular time series data with a linear regression model (based on the lm function from the stats package). It supports both ts and tsibble objects as inputs and enables ... [Read more...]

The simplest tidy machine learning workflow

February 5, 2020 | R on Jorge Cimentada

caret is a magical package for doing machine learning in R. Look at this code for running a regularized regression:

library(caret)

inTrain <- createDataPartition(y = mtcars$mpg,
                               p = 0.75,
                               list = FALSE)  

reg_mod <- train(
  mpg ~ .,
  data = mtcars[inTrain, ],
  method = "glmnet",
  tuneLength = 10,
  preProc = c("center", "scale"),
  trControl = trainControl(method = "cv", number = 10)
)

The two function calls in the expression above perform these operations: Create a training set containing a random sample of 75% of the initial sample Center and scale all predictors ... [Read more...]

Introduction to the forecastLM package

February 5, 2020 | Rami Krispin

Visualization of the Debt/GDP ratio and national debt level

February 5, 2020 | Yossi Levy

I saw this graph on Twitter a few days ago: [1] Short googling revealed that this is a relatively old graph from October 2017. On one hand, this is a really cool visualization. On the other hand, it also belongs… Continue reading →

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Please, somebody create an ETF that buys EU CO2 emission allowances! I’d like the gamble to earn money by fighting climate change.

February 5, 2020 | Economics and R - R posts

I really would like to buy now EU CO2 allowances and keep them for 5-20 years before selling them back. This transaction is likely to reduce total EU CO2 emissions and I would even have the chance to make some money out of it. That one can actually reduce emission (...

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Shiny: Load testing and horizontal scaling

February 5, 2020 | eoda GmbH

„Money can’t buy you happiness, but it can buy you more EC2 Instances…“ – With this quote Sean Lopp, Product Manager at RStudio, PBC, rang in his „Scaling Shiny“ showcase. In this showcase, he uses a load-testing approach to show how a Shiny application can be scaled for 10,000 users. RStudio’...

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#TidyTuesday and tidymodels

February 4, 2020 | Rstats on Julia Silge

This week I started my new job as a software engineer at RStudio, working with Max Kuhn and other folks on tidymodels. I am really excited about tidymodels because my own experience as a practicing data scientist has shown me some of the areas for growth that still exist in ...

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Some 2020 R Conferences

February 4, 2020 | R Views

rstudio::conf kicked off the 2020 season for R conferences last week with record attendance somewhere north of twenty-one hundred. Session topics ranged from business to science, marketing to medicine and attracted R users with very varied backgrounds including DevOps professionals, data scientists, journalists, physicians, statisticians, R package developers, Shiny developers ...

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The Fun of Building Things and the Challenge of Learning – the rOpenSci OzUnconf 2019

February 4, 2020 | rOpenSci - open tools for open science

It was the best of times, it was the worst of times. Dickens might have meant it figuratively, but in the case of the rOpenSci OzUnconf 2019, we mean it literally. Set to the backdrop of a national emergency that is still ongoing from 11-13 December, our participants came from across ... [Read more...]

wrapr Update: Removing Some Under-Used Functions and Classes

February 4, 2020 | John Mount

For the next version of the R package wrapr we are going to be removing a number of under-used functions/methods and classes. This update will likely happen in March 2020, and is the start of the wrapr 2.* series. Most of the items being removed are different abstractions for helping with ... [Read more...]

Consensus clustering in R

February 4, 2020 | chris2016

The logic behind the Monti consensus clustering algorithm is that in the face of resampling the ideal clusters should be stable, thus any pair of samples should either always or never cluster together. We can use this principle to infer the optimal number of clusters (K). This works by examining ...

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RStudio::conf 2020 San Francisco Recap

February 4, 2020 | Jordan Gray

RStudio::conf 2020 is a wrap! What a tremendous experience. It was quite a production to send four Appsilon team members to San Francisco, California from Warsaw with nearly 100 kg of swag, but it was absolutely worthwhile. We were a proud sponsor of the event, and having a booth set up ...