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  1. Dec 2019
  2. jrnold.github.io jrnold.github.io
    13 Relational data | R for Data Science Solutions
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    1. srpnr 03 Dec 2019
      What is meant by “48 hours over the course of the year”? This could mean two days, a span of 48 contiguous hours, or 48 hours that are not necessarily contiguous hours. I will find 48 not-necessarily contiguous hours. That definition makes better use of the methods introduced in this section and chapter.

      Thank you for the book! Could you provide a hint as to how you might go about with this if 48 hours here meant any contiguous 48 hours? My guess is using a windowing function, but I couldn't figure it out.

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    jrnold.github.io/r4ds-exercise-solutions/relational-data.html