Practice the following exercises to revise the concept of reproducibility learned in this chapter:
- Review: When we created the data frame from nothing, we combined a vector of 1,000 binomially distributed random variables, 1,000 normally distributed random variables, and a vector of two colors, red and white. Since all the columns in a data frame have to be the same length, how did R allow this? What is the property of vectors that allows this?
- Seek out, read, and attempt to understand the source code of some of your favorite R packages. What version control system is the author of the package using?
- Carefully review the analysis that was used as an example in this chapter. In what manner can this analysis be improved upon? Look ...