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  1. Jan 2020
  2. jrnold.github.io jrnold.github.io
    14 Strings | R for Data Science Solutions
    1
    1. anans 17 Jan 2020
      Write a function that turns (e.g.) a vector c("a", "b", "c") into the string "a, b, and c". Think carefully about what it should do if given a vector of length 0, 1, or 2.

      Can we the whole code replace with: ifelse(length(x)==1, x, str_c(str_c(x[-length(x)], collapse = ", ")," and ",str_c(x[length(x)], collapse = ",")))

      of course in the form of a function

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    jrnold.github.io/r4ds-exercise-solutions/strings.html
  3. jrnold.github.io jrnold.github.io
    7 Exploratory Data Analysis | R for Data Science: Exercise Solutions
    1
    1. anans 09 Jan 2020
      Distribution of last digit

      Why we do that? Just to see if each digit appears or what? Thanks

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    jrnold.github.io/r4ds-exercise-solutions/exploratory-data-analysis.html