# Blog Archives

## Climate change: Modeling 140+ years of temperature data with tsibble and fable

January 20, 2019
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Background to this post: rstudio::conf 2019 I had the wonderful opportunity to attend RStudio’s annual conference in Austin, Texas last week, supported by a generous grant from RStudio. While I can’t possibly write about all of the incredible people I met and the excellent presentations I saw, I’d like to share some of what I learned through a pair of...

## The Riddler: Santa Needs Some Help With Math

December 21, 2018
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For the last Riddler of the year I attempt to solve both the Express and Classic Riddlers! Riddler Express: How Long Will it Take Santa to Place his Reindeer? We need to find out how long it will take Santa to place his reindeer in the correct sled positions, if he proceeds at random. It takes a minute to harness a...

## Riddler Express: The Chess Match Problem

November 17, 2018
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The Problem This week’s Riddler Express was more involved than I anticipated. The World Chess Championship is underway. We need to find the odds that the better player wins a 12-game match, given: One of the players is better than his opponent to th...

## Charting The Top Five Climate Data Sets Using ggplot2

November 15, 2018
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What is this post about? The urgent need to address climate change implies that we should all act to communicate and confront this existential risk. However, the enormous amount of climate data can be daunting for non-experts such as myself to navigate. What data should we be looking at? Where can I find them? In 2008 Professor Stefan Rahmstorf presented...

## Riddler Classic: How Far Would You Go To Rig A Coin Flip?

November 2, 2018
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An Election Probability Riddler Classic, Just in Time for November 6 two math puzzles to end your week right: https://t.co/ty6CpcrWXK pic.twitter.com/9EnPlGbwEt— Oliver Roeder (@ollie) November 2, 2018 This week’s FiveThirtyEight Riddler Classic was about winning elections, fair and square, or by any means necessary… In this case, it’s Programmers versus Theorists, and elections are decided by flipping coins for each of...

## Riddler Classic: Riddler League Football Cards

September 7, 2018
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Another Riddler Classic Simulation + Animation two math puzzles to end your week right: https://t.co/DxDm2arvpB pic.twitter.com/ki8KnQyC5Z— Oliver Roeder (@ollie) September 7, 2018 This week’s FiveThirtyEight Riddler Classic presented another opportunity to simulate repeated sampling and visualize the results. In this instance we needed to find the average number of unique 10-card samples needed to form a set of 100 unique cards. The...

## Riddler Classic: The Perfect Doodle Puzzle

August 4, 2018
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Apologia It’s been quite a while since my last post and I regret that. I’ve been rather busy, mainly with this. Now that’s succesfully out of the way I have a little more time to write a few words and post a little R code here. Despite the lack of blogging, I always seem to find the time for a...

## Riddler Express: Arithmetic Anarchists Attack

April 13, 2018
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On the April 6, 2018 FiveThirtyEight Riddler Express The Riddler is the excellent math and logic puzzle weekly by Oliver Roeder. Puzzles are posted every friday, together with the solutions to the previous week’s puzzles. I occasionally submit proposed solutions, using R whenever possible. Yesterday Ollie was kind enough to give me a shout out for the ggplot chart that...

## Best Behavior, Teething Troubles, or Looking the Other Way?

February 22, 2018
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Corporate Regulatory Fines in the First Year of the Trump Administration We Assess the Monetary Fines and Settlements of Large US Public Corporations During the First Year of the Trump Administration We examine the current constituents of the Russell 1000, an index of large and mid size US public corporations. We do not include foreign, private, or smaller US corporations. The...

## Phyllotaxis3D, Belatedly

February 18, 2018
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I coded my first R/Shiny app a month ago, but never wrote about it anywhere. Here’s the backstory. What the heck is phyllotaxis, anyway? As part of my exploration of the R world I came upon @aschinchon’s fantastic fronkonstin website. It’s a beautiful and creative display of mathematics and art, often pushing the limits of what can be done in a...