December 2019

apply family functions – Part 3

December 8, 2019 | Posts on

In this new post about the apply family functions, we’ll show some examples of three new functions: lapply(), sapply(), and vapply(). These functions generally works with objects of class list; however, other variants can work with vectors. Suppose n... [Read more...]

Training courses in San Francisco

December 8, 2019 | Rhian Davies

Jumping Rivers are coming to San Francisco in January 2020! We'll be running a number of R training courses with Paradigm Data. You can find the booking links and more details over at our courses page. Don't be afraid to get in contact if you have any questions! 22nd January - ...
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Advent of Code 2019 challenge with R

December 8, 2019 | tomaztsql

I have decided to tackle this year’s Advent Of Code using R (more or less). I know there are more preferred languages, such as Python, C#, Java, JavaScript, Go, Kotlin, C++, Elixir, but it was worth trying. Into the 8th…Read more ›
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State Taxes: It’s not just about Income

December 7, 2019 | Outsider Data Science

Which States Impose the Most “Tax Pain?” Much of the discussion around tax burdens focuses on income taxes but, at the state level, that leaves out two other big sources of tax liability, sales and property taxes. Here we’ll quickly look at the interplay of all three taxes in ...
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Advent of Code 2019-08 with R & JavaScript

December 7, 2019 | Colin Fay

Solving Advent of Code 2019-08 with R and JavaScript. [Disclaimer] Obviously, this post contains a big spoiler about Advent of Code, as it gives solutions for solving day 8. About the JavaScript code The JavaScript code has been written in the same ...
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Practical Tidy Evaluation

December 7, 2019 | Jesse Cambon

Tidy evaluation is a framework for controlling how expressions and variables in your code are evaluated by tidyverse functions. This framework, housed in the rlang package, is a powerful tool for writing more efficient and elegant code. In particular, you’ll find it useful for passing variable names as inputs ...
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Inset maps with ggplot2

December 7, 2019 | the Geocomputation with R website

Inset maps enable multiple places to be shown in the same geographic data visualisation, as described in the Inset maps section (8.2.7) of our open source book Geocomputation with R. The topic of inset maps has gained attention and recently Enrico Spinielli asked inset maps could be created for data in ...
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Le Monde puzzle [#1119]

December 7, 2019 | xi'an

A digit puzzle as Le weekly Monde current mathematical puzzle that sounds close to some earlier versions: Perfect squares are pairs (a²,b²) with the same number of digits such that a²b² is itself a square. What is the pair providing a²b² less than 10⁶? Is there a solution ...
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What is new for rquery December 2019

December 7, 2019 | John Mount

Our goal has been to make rquery the best query generation system for R (and to make data_algebra the best query generator for Python). Lets see what rquery is good at, and what new features are making rquery better. The idea is: the query is a first class citizen ... [Read more...]

RcppArmadillo 0.9.800.3.0

December 7, 2019 | Thinking inside the box

A small Armadillo bugfix upstream update 9.800.3 came out a few days ago. The changes, summarised by Conrad in email to me (and for once not yet on the arma site are fixes for matrix row iterators, better detection of non-hermitian matrices by eig_s... [Read more...]

RDieHarder 0.2.1

December 7, 2019 | Thinking inside the box

A new version, now at 0.2.1, of the random-number generator tester RDieHarder (based on the DieHarder suite developed / maintained by Robert Brown with contributions by David Bauer and myself) is now on CRAN. This version has only internal changes. B... [Read more...]

Advent of Code 2019-07 with R

December 6, 2019 | Colin Fay

Solving Advent of Code 2019-07 with R. [Disclaimer] Obviously, this post contains a big spoiler about Advent of Code, as it gives solutions for solving day 7. Instructions Find the instructions at: https://adventofcode.com/2019/day/7 R solution ve... [Read more...]

From one Regression to Hundreds Within Seconds: A Shiny Specification Curve

December 6, 2019 | An Accounting and Data Science Nerd's Corner

Online appendices detailing the robustness of empirical analyses are paramount but they never let readers explore all reasonable researcher degrees of freedom. Simonsohn, Simmons and Nelson suggest a ‘specification curve’ that allows readers to eyeball how a main coefficient of interest varies across a wide arrange of specifications. I build ...
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Choropleth Map in ggplot2

December 6, 2019 | data technik

Creating a map in ggplot2 can be surprisingly easy! This tutorial will show the US by state. The dataset is from 1970 and will show some US statistics including population, income, life expectancy, and illiteracy. I love making maps, while predictive statistics provide such great insight, map making was one thing ...
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