Mois : août 2018

RSS Variance Explained

  • The 'circular random walk' puzzle: tidy simulation of stochastic processes in R novembre 23, 2020
    Previously in this series The “lost boarding pass” puzzle The “deadly board game” puzzle The “knight on an infinite chessboard” puzzle The “largest stock profit or loss” puzzle The “birthday paradox” puzzle The “Spelling Bee honeycomb” puzzle Feller’s “coin-tossing” puzzle The “spam comments” puzzle The “prisoner coin flipping” puzzle I love 538’s Riddler column, and […]
    David Robinson
  • The 'prisoner coin flipping' puzzle: tidy simulation in R mai 4, 2020
    Previously in this series The “lost boarding pass” puzzle The “deadly board game” puzzle The “knight on an infinite chessboard” puzzle The “largest stock profit or loss” puzzle The “birthday paradox” puzzle The “Spelling Bee honeycomb” puzzle Feller’s “coin-tossing” puzzle The “spam comments” puzzle I love 538’s Riddler column, and I’ve enjoyed solving the May […]
    David Robinson
  • The 'spam comments' puzzle: tidy simulation of stochastic processes in R avril 13, 2020
    Previously in this series: The “lost boarding pass” puzzle The “deadly board game” puzzle The “knight on an infinite chessboard” puzzle The “largest stock profit or loss” puzzle The “birthday paradox” puzzle The “Spelling Bee honeycomb” puzzle Feller’s “coin-tossing” puzzle I love 538’s Riddler column, and the April 10 puzzle is another interesting one. I’ll […]
    David Robinson
  • Feller's coin-tossing puzzle: tidy simulation in R janvier 17, 2020
    Previously in this series: The “lost boarding pass” puzzle The “deadly board game” puzzle The “knight on an infinite chessboard” puzzle The “largest stock profit or loss” puzzle The “birthday paradox” puzzle I have an interest in probability puzzles and riddles, and especially in simulating them in R. I recently learned about Feller’s coin-tossing puzzle, […]
    David Robinson
  • The 'Spelling Bee Honeycomb' puzzle: efficient computation in R janvier 6, 2020
    Previously in this series: The “lost boarding pass” puzzle The “deadly board game” puzzle The “knight on an infinite chessboard” puzzle The “largest stock profit or loss” puzzle The “birthday paradox” puzzle I love 538’s Riddler column, and the January 3 puzzle is a fun one. I’ll quote: The New York Times recently launched some […]
    David Robinson
  • The birthday paradox puzzle: tidy simulation in R janvier 3, 2020
    Previously in this series: The “lost boarding pass” puzzle The “deadly board game” puzzle The “knight on an infinite chessboard” puzzle The “largest stock profit or loss” puzzle The birthday problem is a classic probability puzzle, stated something like this. A room has n people, and each has an equal chance of being born on […]
    David Robinson
  • The 'largest stock profit or loss' puzzle: efficient computation in R décembre 24, 2019
    Previously in this series: The “lost boarding pass” puzzle The “deadly board game” puzzle The “knight on an infinite chessboard” puzzle I recently came across an interview problem from A Cool SQL Problem: Avoiding For-Loops . Avoiding loops is a topic I always enjoy reading about, and the blog post didn’t disappoint. I’ll quote that […]
    David Robinson
  • The 'knight on an infinite chessboard' puzzle: efficient simulation in R décembre 10, 2018
    Previously in this series: The “lost boarding pass” puzzle The “deadly board game” puzzle I’ve recently been enjoying The Riddler: Fantastic Puzzles from FiveThirtyEight, a wonderful book from 538’s Oliver Roeder. Many of the probability puzzles can be productively solved through Monte Carlo simulations in R. Here’s one that caught my attention: Suppose that a […]
    David Robinson
  • Exploring college major and income: a live data analysis in R octobre 16, 2018
    I recently came up with the idea for a series of screencasts: I've thought about recording a screencast of an example data analysis in #rstats. I'd do it on a dataset I'm unfamiliar with so that I can show and narrate my live thought process.Any suggestions for interesting datasets to use?— David Robinson (@drob) October […]
    David Robinson
  • Who wrote the anti-Trump New York Times op-ed? Using tidytext to find document similarity septembre 6, 2018
    Like a lot of people, I was intrigued by “I Am Part of the Resistance Inside the Trump Administration”, an anonymous New York Times op-ed written by a “senior official in the Trump administration”. And like many data scientists, I was curious about what role text mining could play. Ok NLP people, now’s your chance […]
    David Robinson

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