Rick Wicklin

@RickWicklin

Programmer with R&D. Blogger. Author of _Statistical Programming with SAS/IML Software_ and _Simulating Data with SAS_

Cary, NC
Joined October 2010

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  1. Pinned Tweet
    Jan 14

    Posts from The DO Loop blog in 2020 that deserve a second look

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  2. Nov 16

    Halfway through comes the key word: "audience." When you create a graph, do so with your target audience in mind. "our chart... won’t be as useful to the audience as it could be" unless we know "what it needs to communicate about the data."

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  3. Nov 10

    My book _Simulating Data with SAS_ is the "E-book of the Month." Take advantage of this opportunity to own it at 40% off!

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  4. Nov 6
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  5. Oct 28

    An introduction to genetic algorithms in . Genetic algorithms are heuristic methods that use randomization to mimic natural selection and evolution.

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  6. Oct 28

    Crossover and mutation: An introduction to the two most important operations in genetic algorithms.

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  7. Oct 28

    Penalties versus constraints in problems. When can you replace a constrained optimization by adding a penalty term to the objective function and solving an unconstrained optimization? Some math and an example.

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  8. Retweeted
    Oct 26

    🎉 Celebrating with a graphing puzzle to make your own 🎃

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  9. Oct 27

    David Hand has mentioned this in connection with his "Laws of Coincidence." The Law of Truly Large Numbers says that even rare events are expected to occur when a trial is repeated a large number of times.

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  10. Oct 27

    The knapsack problem is a well-known problem. How to solve the knapsack problem by using binary integer programming in

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  11. Oct 27

    AND, OR, and NOT: logical statements with scalar quantities are straightforward. But is it easy to program the logical negation of a binary vector? (Spoiler: Yes!)

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  12. Oct 27

    Nonuniform sampling: How to choose samples with specified statistical properties.

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  13. Oct 27

    Interpret estimates for a Weibull regression model in .

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  14. Oct 27

    I'll be giving a on Nov. 9 at 11 am ET about communicating -related statistics and visualizations, with a focus on clear communication to non-scientists. Based on a series of COVID-related blogs posts I wrote in Spring 2020.

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  15. Retweeted
    Sep 28

    Breakthrough cases of polio—including deaths—were common during early polio vaccination. What kept us safe was not perfect vaccine efficacy. It was that Americans quickly & massively stepped up to get the imperfect vaccine, quashing transmission. From:

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  16. Sep 9
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  17. Sep 9
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  18. Sep 3

    Q: When are most babies born in the US? A: The weeks after LABOR day! Actually, this joke is true! See a summary of the at based on Natl Ctr for Health Stats

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  19. Retweeted

    This is arguably the most important single piece of epidemiological research of the entire pandemic. A MASSIVE randomized trial launched a pro-mask campaign in some Bangladeshi villages, but not others. The result: masking villages got less COVID.

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  20. Sep 3

    Celebrating my 11th Blog-iversary! Eleven years of blogging about , , , programming, , and matrix computations at The DO Loop:

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  21. Sep 2

    I thought this was a joke, but it's actually in a journal. Don't know whether to laugh or cry.

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