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  1. May 2020
  2. jrnold.github.io jrnold.github.io
    5 Data transformation | R for Data Science: Exercise Solutions
    2
    1. Branicek 31 May 2020
      What other variables are missing?

      summary(is.na(flights)) will give NAs of all variables

    2. Branicek 31 May 2020
      >

      should be >= (at least meaning 30 or more)

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    jrnold.github.io/r4ds-exercise-solutions/transform.html