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uni/year2/semester1/logseq-stuff/pages/Describing Data in R.md

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  • #ST2001 Labs
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  • Most of our computation in R will be using data in table form, with rows & columns, which are often stored as a data.frame object.
    • The rows usually represent different observations, (e.g., humans, cars, etc.) and the columns represent different variables (features of the observation), (e.g., height, weight, etc.).
  • What does glimpse() do? #card card-last-interval:: 4 card-repeats:: 2 card-ease-factor:: 2.7 card-next-schedule:: 2022-11-22T18:34:17.944Z card-last-reviewed:: 2022-11-18T18:34:17.945Z card-last-score:: 5
    • The glimpse() function gives us an overview of the dataset on each experimental unit.
  • What does dim() do? #card card-last-interval:: 29.99 card-repeats:: 4 card-ease-factor:: 2.56 card-next-schedule:: 2022-12-14T19:04:53.617Z card-last-reviewed:: 2022-11-14T20:04:53.617Z card-last-score:: 5
    • The dim() function returns the number of rows & columns in a dataframe.